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26,551 first names, 70,620 last names, 333,585 kanji variations.
one of the best Japanese name search tools for your baby!
Kouchan(こうちゃん)Koucha( こうちゃ)
Koutan( こうたん)
This name is primarily a unisex name, often male. For males, click here.
In Japanese culture, kanji are characters that originated from Chinese script, and the meaning of a name changes depending on the kanji characters chosen. The more variations of kanji a name has, the more common it is in Japan. Conversely, a name with very few kanji variations is considered unique and rare. Below are the kanji variations for "Kou," ranked by the total number of "Good!" votes.
滉 means "wide and deep."
Deep - Refers to a deep body of water, such as a sea or river.
Wide - Refers to a wide body of water.
Depth - This kanji can be used to symbolize depth, both in terms of physical depth and emotional depth.
Abundance - Th kanji can also be used to symbolize abundance, as it is associated with a wide and deep body of water.
Strength - This kanji can also be used to symbolize strength, as it is associated with a powerful and expansive body of water.
恋 means "love, affection, romance."
Strongly Attracted - Feeling a strong pull of the heart towards someone.
Love - A feeling of deep affection and fondness.
Attraction - A strong feeling of being drawn to someone.
Devotion - A deep and abiding loyalty to someone.
Affection - A warm and tender feeling of fondness and love.
海 means "ocean, sea."
Sea - A large body of water, usually salty, that covers much of the Earth's surface.
Sea God - A deity associated with the sea, often depicted as a powerful and benevolent figure.
Lake Or Pond - A large body of fresh water, usually surrounded by land.
Wide And Large - Describing something that is very broad and expansive.
Gathering Place - A place where many people or things come together.
虚 means "emptiness, void, hollow, false, vain."
Empty - Having nothing inside, hollow, empty, superficial.
Weak - Physically weak.
Hole - An opening.
Hill - A large hill.
Ruins - The remains of a building, such as a ruin.
Empty - Symbolizing a clean slate and a fresh start.
Weak - Symbolizing the need for strength and resilience.
Hollow - Symbolizing the potential for growth and development.
Hill - Symbolizing the journey of life and the need for perseverance.
Ruin - Symbolizing the importance of making the most of life.
空 means "sky, emptiness."
Sky - The vast expanse of the atmosphere above the earth.
Loneliness - A feeling of emptiness or desolation.
Emptiness - A lack of content or substance.
Waste - Something that is not used or is of no value.
Void - An empty space or area.
To Empty - To make something empty or void.
Wide - Having a large area or extent.
Hole - An opening or passage through something.
Gap - A space between two things.
Sky - A reminder of the vastness of the universe and the potential for greatness.
Loneliness - A reminder of the importance of companionship and connection.
Emptiness - A reminder of the importance of filling one's life with meaningful experiences.
Wide - A reminder of the importance of having a broad perspective and open-mindedness.
Hole - A reminder of the importance of finding one's place in the world.
Gap - A reminder of the importance of bridging divides and connecting with
紘 means "cord, thread, yarn."
Wide - Having a large area or scope.
String - A cord or ribbon used to tie or fasten something, such as a hat or a dress.
Boundary - A line that marks the limits of an area
Grand - This is a positive and uplifting name that conveys a sense of grandeur and greatness. It is also a reminder of the importance of having a strong foundation and a sense of purpose in life.
Wide - This kanji conveys a sense of openness and expansiveness. It is a reminder that life is full of possibilities and that we should strive to explore them.
Cord - This kanji is a reminder of the importance of connections and relationships. It is a reminder that we are all connected and that we should strive to build strong relationships with those around us.
Boundary - This kanji is a reminder of the importance of setting boundaries and respecting them. It is a reminder that we should strive to be mindful of our own limits and the limits of others.
凰 means "phoenix, bird of legend."
Phoenix - A legendary bird that is said to appear during auspicious occasions. Male Phoenix
Auspicious - Symbolizing good luck and fortune.
Legendary - Representing something that is extraordinary and remarkable.
Courageous - Symbolizing strength and bravery.
向 means "direction, orientation, to face, to turn towards."
To Go Towards - This refers to the action of moving in a certain direction.
To Face - This refers to the action of turning one's face or body towards a certain direction.
To Direct - This refers to the action of pointing or aiming something towards a certain direction.
To Proceed Towards A Certain Direction - This refers to the action of moving in a certain direction.
Direction - This refers to the orientation or path that something is facing or moving towards.
The Opposite Side - This refers to the side that is opposite to the one that is being referred to.
The Front - This refers to the side that is facing the person or object that is being referred to.
The Forward Side - This refers to the side that is in front of the person or object that is being referred to.
The Other Side - This refers to the side that is on the other side of the person or object that is being referred to.
Suitable - This refers to something that is appropriate or fitting for a certain situation.
Direction - This kanji symbolizes the idea of direction and can be used to represent the idea of a baby heading in the right direction in life.
Facing - This kanji symbolizes the idea of facing something or someone, and can be used to represent the idea of a baby facing the world with courage and strength.
Progress - This kanji symbolizes the idea of progress and can be used to represent the idea of a baby making progress in life.
Suitable - This kanji symbolizes the idea of being suitable or fitting in, and can be used to represent the idea of a baby being suitable for the world.
岬 means "cape, promontory."
Gap - A low area between two mountains.
Cape - The tip of a piece of land that juts out into the sea or a lake.
Nook - This kanji implies a place of refuge and safety, suggesting a secure and comfortable home for the child.
Haven - This kanji implies a place of peace and tranquility, suggesting a peaceful and harmonious environment for the child.
Refuge - This kanji implies a place of protection and shelter, suggesting a secure and safe environment for the child.
Sanctuary - This kanji implies a place of refuge and solace, suggesting a secure and comforting home for the child.
Retreat - This kanji implies a place of retreat and respite, suggesting a peaceful and calming environment for the child.
幸 means "happiness, good fortune, luck."
Happiness,Fortunate - Being blessed with good luck, fortune, and joy.
Cherish,Love - Showing affection and care for someone or something.
Appreciate,Like - Having a favorable opinion of something.
Harvest - Gaining a reward or benefit from nature.
康 means "health, peaceful, comfortable."
Healthy - Having good physical and mental health
Robust - Strong and healthy
Peaceful - Free from disturbance
Prosperous - Having success or good fortune
Healthy - Conveying the wish for the baby to have good physical and mental health and to be free from illness or injury.
Prosperous - Conveying the wish for the baby to have success and good fortune in life.
Peaceful - Conveying the wish for the baby to have a tranquil and calm life.
甲 means "armor, first, a (in a sequence of items)."
First In Rank Or Order - The first in a series of things or a class of things.
Hard Outer Covering - A hard outer covering that covers the exterior of something. e.g. Turtle shell(甲羅).
Armor - Protective clothing that covers the body. e.g. 甲冑.
Element Of Wood - In the Five Elements, it is associated with Wood.
Direction Of East - In the Eight Directions, it is associated with East.
First In Rank Or Class - It implies that the child is special and has achieved a high level of success.
Hard Outer Covering - It implies that the child is strong and resilient.
Armor - It implies that the child is protected and safe.
Wood In The Five Elements - It implies that the child is connected to nature and has a strong foundation.
East In The Four Directions - It implies that the child is connected to the sun and has a bright future.
High Pitched Voice - It implies that the child is cheerful and has a positive outlook.
皇 means "emperor, sovereign, monarch."
King - A male ruler of a country or state.
Emperor - A sovereign ruler of an empire.
Monarch - A hereditary ruler of a country or state.
Hurried - Moving or acting quickly.
Hectic - Characterized by intense activity or busyness.
Busy - Engaged in activity
For Naming a Baby:
King - A strong and noble name for a baby boy, symbolizing power and authority.
Emperor - A regal name for a baby boy, symbolizing strength and leadership.
Monarch - A dignified name for a baby boy, symbolizing royalty and tradition.
Celestial Emperor - A divine name for a baby boy, symbolizing divine power and protection.
皐 means "riverside, shore, beach."
Satsuki - The fifth month of the lunar calendar.
Shoreline - Land by the water. Shoreline.
High place.
To call out loudly.
May - A beautiful name for a baby born in the fifth month of the lunar calendar.
Shoreline - This kanji that symbolizes the beauty of nature and the peacefulness of the shoreline.
High Place - This kanji that symbolizes strength and courage.
Shout - This kanji that symbolizes the power of voice and the ability to speak up.
航 means "navigation, sail, voyage."
To Ferry - To move across water by boat.
Boat Bridge - A bridge constructed by arranging boats side by side.
Voyage - This kanji implies a journey or voyage, suggesting a life of exploration and adventure.
Bridge - This kanji symbolizes a bridge between two worlds, suggesting a life of connection and understanding.
Boat - This kanji symbolizes a boat, suggesting a life of stability and security.
Travel - This kanji implies a life of travel and exploration, suggesting a life of discovery and growth.
Journey - This kanji implies a life of journey and exploration, suggesting a life of growth and discovery.
仔 means "offspring, young animal, child."
Endure - To endure a task or responsibility.
Child - A child, such as a child of a family or livestock.
Detailed - Very detailed and precise.
Enduring - This is a positive trait that implies the baby will be able to handle difficult situations and tasks with resilience.
Child - It implies innocence and youth.
Pet - This is a suitable name for a baby if they are being adopted from a pet shelter or if the parents have a special connection to animals.
Detailed - This is a good name for a baby if the parents want to emphasize the importance of paying attention to detail and being thorough in their work.
有 means "existence, possession, having."
Exist - To be present or in a certain place.
Possess - To have or own something.
Maintain - To keep something in a certain state or condition.
Furthermore - In addition
To Have - This is a positive name that conveys the idea of having something, whether it be material possessions, knowledge, or even a sense of purpose. It is a reminder that we have the power to create our own destiny.
To Exist - This is a name that conveys the idea of existing in the world, of being part of something larger than ourselves. It is a reminder that we are all connected and that our actions have an impact on the world around us.
To Possess - This is a name that conveys the idea of having something, whether it be material possessions, knowledge, or even a sense of purpose. It is a reminder that we have the power to create our own destiny.
To Own - This is a name that conveys the idea of having something, whether it be material possessions, knowledge, or even a sense of purpose. It is a reminder that we have the power to create our own destiny.
To Keep - This is a name that conveys the idea of keeping something, whether it be material possessions, knowledge, or even a sense of purpose. It is a reminder that we have the power to create our own destiny.
光 means "light, radiance."
Light - Brightness, illumination, to shine, to sparkle.
Honor - Fame, reputation, glory.
Scene - Appearance, state.
Blessing - Benefit, grace.
Time - Moment, date.
Respect - Showing respect for another's actions. e.g. 光臨(visit)
皇 means "emperor, sovereign, monarch."
King - A male ruler of a country or state.
Emperor - A sovereign ruler of an empire.
Monarch - A hereditary ruler of a country or state.
Hurried - Moving or acting quickly.
Hectic - Characterized by intense activity or busyness.
Busy - Engaged in activity
For Naming a Baby:
King - A strong and noble name for a baby boy, symbolizing power and authority.
Emperor - A regal name for a baby boy, symbolizing strength and leadership.
Monarch - A dignified name for a baby boy, symbolizing royalty and tradition.
Celestial Emperor - A divine name for a baby boy, symbolizing divine power and protection.
向 means "direction, orientation, to face, to turn towards."
To Go Towards - This refers to the action of moving in a certain direction.
To Face - This refers to the action of turning one's face or body towards a certain direction.
To Direct - This refers to the action of pointing or aiming something towards a certain direction.
To Proceed Towards A Certain Direction - This refers to the action of moving in a certain direction.
Direction - This refers to the orientation or path that something is facing or moving towards.
The Opposite Side - This refers to the side that is opposite to the one that is being referred to.
The Front - This refers to the side that is facing the person or object that is being referred to.
The Forward Side - This refers to the side that is in front of the person or object that is being referred to.
The Other Side - This refers to the side that is on the other side of the person or object that is being referred to.
Suitable - This refers to something that is appropriate or fitting for a certain situation.
Direction - This kanji symbolizes the idea of direction and can be used to represent the idea of a baby heading in the right direction in life.
Facing - This kanji symbolizes the idea of facing something or someone, and can be used to represent the idea of a baby facing the world with courage and strength.
Progress - This kanji symbolizes the idea of progress and can be used to represent the idea of a baby making progress in life.
Suitable - This kanji symbolizes the idea of being suitable or fitting in, and can be used to represent the idea of a baby being suitable for the world.
日 means "sun, day, Japan."
Daytime - The time when the sun is out.
Day - A full 24-hour period.
Everyday - Every day.
Abbreviation Of Japan - The abbreviation of Japan.
Sunday - One of the seven days of the week.
小 means "small, little, tiny."
Small - Refers to something that is of a small size or amount.
Insignificant - Refers to something that is not important or of little value.
Young - Refers to someone who is young in age.
Humble - Refers to someone who speaks of themselves in a humble manner.
Prefix - Used as a prefix to modify the meaning of a word or phrase.
羽 means "feather, wing."
Feathers - The feathers of a bird or insect.
Bird - A bird or other avian species.
Ornament - An ornament held in the hand when dancing.
Help - Something that provides assistance. An assistant.
Numeral - A numeral used to count birds or rabbits.
Wing - This is a symbol of freedom and hope, and is a reminder that the baby will have the opportunity to explore the world and reach their full potential.
Bird - This is a symbol of beauty and grace, and is a reminder that the baby will have the opportunity to soar and reach new heights.
Help - This is a symbol of support and guidance, and is a reminder that the baby will have the support of their family and friends to help them reach their goals.
Number - This is a symbol of luck and fortune, and is a reminder that the baby will have the opportunity to make their own luck and find success in life.
幸 means "happiness, good fortune, luck."
Happiness,Fortunate - Being blessed with good luck, fortune, and joy.
Cherish,Love - Showing affection and care for someone or something.
Appreciate,Like - Having a favorable opinion of something.
Harvest - Gaining a reward or benefit from nature.
羽 means "feather, wing."
Feathers - The feathers of a bird or insect.
Bird - A bird or other avian species.
Ornament - An ornament held in the hand when dancing.
Help - Something that provides assistance. An assistant.
Numeral - A numeral used to count birds or rabbits.
Wing - This is a symbol of freedom and hope, and is a reminder that the baby will have the opportunity to explore the world and reach their full potential.
Bird - This is a symbol of beauty and grace, and is a reminder that the baby will have the opportunity to soar and reach new heights.
Help - This is a symbol of support and guidance, and is a reminder that the baby will have the support of their family and friends to help them reach their goals.
Number - This is a symbol of luck and fortune, and is a reminder that the baby will have the opportunity to make their own luck and find success in life.
湖 means "lake."
Lake - A large body of water surrounded by land, usually fresh water.
Dongting Lake - A large lake in China, located in the middle of the Yangtze River basin.
羽 means "feather, wing."
Feathers - The feathers of a bird or insect.
Bird - A bird or other avian species.
Ornament - An ornament held in the hand when dancing.
Help - Something that provides assistance. An assistant.
Numeral - A numeral used to count birds or rabbits.
Wing - This is a symbol of freedom and hope, and is a reminder that the baby will have the opportunity to explore the world and reach their full potential.
Bird - This is a symbol of beauty and grace, and is a reminder that the baby will have the opportunity to soar and reach new heights.
Help - This is a symbol of support and guidance, and is a reminder that the baby will have the support of their family and friends to help them reach their goals.
Number - This is a symbol of luck and fortune, and is a reminder that the baby will have the opportunity to make their own luck and find success in life.
琥 means "amber."
Amber - A transparent yellow gemstone.
Tiger Token - A token made of a jade stone carved with a tiger.
Tiger Vessel - A vessel made of a jade stone shaped like a tiger.
Transparent Yellow Gemstone - It conveys a sense of beauty and elegance. The gemstone is associated with wealth and prosperity, which could be a positive message for a newborn.
Tiger Shaped Jade Ornament - It conveys a sense of strength and power. The tiger is a symbol of courage and resilience, which could be a positive message for a newborn.
Tiger Engraved Jade Token - It conveys a sense of protection and security. The token is associated with luck and good fortune, which could be a positive message for a newborn.
羽 means "feather, wing."
Feathers - The feathers of a bird or insect.
Bird - A bird or other avian species.
Ornament - An ornament held in the hand when dancing.
Help - Something that provides assistance. An assistant.
Numeral - A numeral used to count birds or rabbits.
Wing - This is a symbol of freedom and hope, and is a reminder that the baby will have the opportunity to explore the world and reach their full potential.
Bird - This is a symbol of beauty and grace, and is a reminder that the baby will have the opportunity to soar and reach new heights.
Help - This is a symbol of support and guidance, and is a reminder that the baby will have the support of their family and friends to help them reach their goals.
Number - This is a symbol of luck and fortune, and is a reminder that the baby will have the opportunity to make their own luck and find success in life.
琴 means "koto: Japanese stringed musical instrument."
A Stringed Musical Instrument - This is a general term for stringed instruments such as the koto (Japanese harp) and wagakki (Japanese traditional stringed instrument).
Harmony - This word can be used to represent harmony and balance in life.
Resonance - This word can be used to represent the resonance of sound and the connection between people.
虹 means "rainbow, arch, bow."
Rainbow - A seven-colored arch-shaped phenomenon seen in the sky after rain.
Disruption - To be disturbed or confused.
Discord - To be in disagreement or dispute.
Turmoil - To be in a state of confusion or chaos.
Rainbow - A symbol of hope, joy, and optimism.
Disruption - A reminder to stay strong and resilient in the face of adversity.
Discord - A reminder to stay open-minded and tolerant of different perspectives.
Turmoil - A reminder to stay focused and determined in the face of chaos.
瑚 means "coral."
Festival Vessel - A festival vessel made of a tree-like structure of calcium carbonate formed by the skeletons of coral found in the sea, used as a decoration.
Coral - A type of calcium carbonate formed by the skeletons of coral found in the sea, used as a decoration.
愛 means "love, affection, fondness."
To Love - To feel deep affection and care for someone or something.
To Cherish - To hold someone or something in high regard and treat them with great care.
To Adore - To feel great admiration and fondness for someone or something.
To Be Fond Of - To have a strong liking for someone or something.
To Be Devoted To - To be dedicated and loyal to someone or something.
Love - To express the deep love and affection that parents have for their child.
Cherish - To emphasize the importance of cherishing and protecting the child.
Adore - To express the admiration and fondness that parents have for their child.
Devotion - To express the dedication and loyalty that parents have for their child.
皐 means "riverside, shore, beach."
Satsuki - The fifth month of the lunar calendar.
Shoreline - Land by the water. Shoreline.
High place.
To call out loudly.
May - A beautiful name for a baby born in the fifth month of the lunar calendar.
Shoreline - This kanji that symbolizes the beauty of nature and the peacefulness of the shoreline.
High Place - This kanji that symbolizes strength and courage.
Shout - This kanji that symbolizes the power of voice and the ability to speak up.
羽 means "feather, wing."
Feathers - The feathers of a bird or insect.
Bird - A bird or other avian species.
Ornament - An ornament held in the hand when dancing.
Help - Something that provides assistance. An assistant.
Numeral - A numeral used to count birds or rabbits.
Wing - This is a symbol of freedom and hope, and is a reminder that the baby will have the opportunity to explore the world and reach their full potential.
Bird - This is a symbol of beauty and grace, and is a reminder that the baby will have the opportunity to soar and reach new heights.
Help - This is a symbol of support and guidance, and is a reminder that the baby will have the support of their family and friends to help them reach their goals.
Number - This is a symbol of luck and fortune, and is a reminder that the baby will have the opportunity to make their own luck and find success in life.
胡 means "hu, foreign, barbarian."
A question word used to express doubt.
Longevity, living a long life.
Ebisu - An ancient ethnic group living in the north and west of China.
Chaotian - Carelessly.
Long Lived - This is a positive connotation that implies a long and prosperous life. It is a suitable name for a baby as it conveys a sense of hope and optimism for the future.
Question - This meaning implies a sense of curiosity and inquisitiveness, which is a desirable trait for a baby to have. It is also a suitable name for a baby as it conveys a sense of exploration and discovery.
Rough - This meaning implies a sense of strength and resilience, which is a desirable trait for a baby to have. It is also a suitable name for a baby as it conveys a sense of determination and perseverance.
Barbarian - This meaning implies a sense of wildness and freedom, which is a desirable trait for a baby to have. It is also a suitable name for a baby as it conveys a sense of adventure and exploration.
宇 means "space, universe."
Roof,House - A roof or house, representing a home and shelter.
Universe - The universe, representing the world and all that is in it.
Spirit,Intelligence - Spirit or intelligence, representing a person's capacity for thought and understanding.
Shelter - Representing a safe and secure home for the baby.
Universe - Representing the vastness of the world and the baby's place in it.
Intelligence - Representing the baby's potential for learning and growth.
虹 means "rainbow, arch, bow."
Rainbow - A seven-colored arch-shaped phenomenon seen in the sky after rain.
Disruption - To be disturbed or confused.
Discord - To be in disagreement or dispute.
Turmoil - To be in a state of confusion or chaos.
Rainbow - A symbol of hope, joy, and optimism.
Disruption - A reminder to stay strong and resilient in the face of adversity.
Discord - A reminder to stay open-minded and tolerant of different perspectives.
Turmoil - A reminder to stay focused and determined in the face of chaos.
羽 means "feather, wing."
Feathers - The feathers of a bird or insect.
Bird - A bird or other avian species.
Ornament - An ornament held in the hand when dancing.
Help - Something that provides assistance. An assistant.
Numeral - A numeral used to count birds or rabbits.
Wing - This is a symbol of freedom and hope, and is a reminder that the baby will have the opportunity to explore the world and reach their full potential.
Bird - This is a symbol of beauty and grace, and is a reminder that the baby will have the opportunity to soar and reach new heights.
Help - This is a symbol of support and guidance, and is a reminder that the baby will have the support of their family and friends to help them reach their goals.
Number - This is a symbol of luck and fortune, and is a reminder that the baby will have the opportunity to make their own luck and find success in life.
香 means "fragrance, aroma, scent."
Appealing - Having an attractive appearance, color, voice, taste, etc.
Chess Piece - One of the pieces 香車(kyousya) in the game of shogi.
雨 means "rain, precipitation."
Rain - This is a symbol of renewal and growth, as rain brings life to the earth. It is also a reminder of the importance of perseverance, as rain can be seen as a metaphor for overcoming obstacles.
Blessing - Rain is often seen as a blessing from the heavens, and can be a reminder of the blessings that come with life.
Strength - Rain is often seen as a symbol of strength and resilience, as it can be seen as a metaphor for overcoming difficult times.
Purity - Rain is often seen as a symbol of purity and innocence, as it is a natural element that is free from human interference.
Renewal - Rain is often seen as a symbol of renewal and rebirth, as it brings new life to the earth.
The list contains people mentioned in Wikipedia. All JP links are in Japanese only. Sorry!
Names that have the same gender and start with K.
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Sort by Most Kanji Variations
This is the order of names with many variations of kanji.
Basically, names with more variations are more common and familiar to the Japanese.
Sort by Most Viewed
The names are sorted by the number of times they have been viewed on this site. This ranking is based on the behavior of users around the world, including Japan, so it does not mean that the names are commonly viewed by Japanese people only.
Please note that just because a name has been viewed more times does not mean it is a famous name in Japan.
What is Hiragana?
Hiragana is a syllabary used in written Japanese, which originated from the cursive style of Kanji.
What is Katakana?
Katakana is also a Japanese syllabary. Basically, the characters don't have any meaning by themselves, they only represent the sounds.
Japanese try to express the words came from foreign languages with the most similar sounds in Japanese using Katakana.
What is English Transcription?
English Transcription is a term used when translating Japanese names into English. It represents a romanised version of the name with the aim of reproducing the pronunciation as accurately as possible. English Transcription can also be used for name searches.
Japanese Style Nickname
In Japan, nicknames are commonly used to express familiarity and affection. Here are key features and contexts:
Shortened Forms: Names are often shortened for ease and intimacy, such as 'Yuki' from 'Yukiko' or 'Taka' from 'Takashi'.
Suffixes: Terms like 'chan' for girls and 'kun' for boys are added to names among close friends and family. However, 'chan' can also be used for boys during childhood. Additionally, among adults who are very close, like best friends, 'chan' may still be used to convey affection and familiarity. More Details
Usage and Cultural Aspects: Nicknames are typically used in informal settings among friends, family, or close colleagues, and are not suitable for formal or professional environments. The use of a nickname suggests a degree of intimacy and should reflect the nature of the relationship. Young people often demonstrate creativity in their social interactions by crafting unique nicknames.
Note: In Japanese, the long vowel sound is indicated by a special character called a "chōonpu" (長音符), which looks like a horizontal dash (ー). This character serves to extend the duration of the vowel sound immediately preceding it. For instance, in the name "あーちゃん" (A-chan), the "あ" (A) is extended, producing a prolonged "ah" sound, similar to the "a" in "father."
Households?
The names are sorted by the number of Japanese households where the surname is used.
The more households there are, the more famous and common the surname is.
About this site's data of last names