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- Japanese Last Names
- Shinkai
Shinkai
-
:しんかい - :シンカイ
- :aprx. 4,800
- :shin-kai (2)
- :shi-n-ka-i (4)
- :Shinkai
Most common kanji writings
- 新海 new + sea (the dominant form)
- 新開 new + open/pioneer
- 新貝 new + shell
- 眞貝 true/genuine + shell
- 真海 true/genuine + sea
About the name
Shinkai is a less common Japanese surname borne by approximately 4,800 households. The dominant 新海 spelling — "new sea" — combines the character 新 ("new") with 海 ("sea" or "ocean"), evoking a coastal or maritime topographic origin. The 新開 variant, meaning "newly opened land," likely arose among families who cleared or pioneered new agricultural territory during the medieval or early modern period. The 眞貝 and 新貝 forms, incorporating 貝 ("shell"), may derive from coastal communities where shellfish gathering played an economic role. The name is distributed broadly across Japan without a dominant regional concentration. Shinkai has produced a notable lineage: politician Eiji Shinkai (新海栄治, 1883–1969); chemist Seiji Shinkai (新海征治, b. 1944), an internationally recognized researcher in supramolecular chemistry; and anime director Makoto Shinkai (新海誠, b. 1973), whose visually stunning films Kimi no Na wa ("Your Name," 2016) and Tenki no Ko ("Weathering with You," 2019) achieved extraordinary global box-office success, making him one of the most internationally celebrated Japanese filmmakers of his generation. The surname carries a crisp, evocative resonance suggestive of open water and new beginnings.
Notable bearers
Makoto Shinkai (新海誠, b. 1973) — acclaimed Japanese anime director; creator of Your Name (2016) and Weathering with You (2019).
Seiji Shinkai (新海征治, b. 1944) — Japanese chemist renowned for research in supramolecular chemistry.
Eiji Shinkai (新海栄治, 1883–1969) — Japanese politician.
This name is also used as a first name: 
Shinkai
Kanji Names & Meanings - 17 variations
In Japanese culture, kanji are characters that originated from Chinese script, and the meaning of a name changes depending on the kanji characters chosen. Even surnames with the same pronunciation can have different meanings based on the kanji used. Below are the kanji variations for "Shinkai," listed in order of popularity based on household usage in Japan.
Introduction to how Japanese names work
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新 means "new, fresh, modern."
海 means "sea, ocean, vast."
- : aprx. 2,000
新 means "new, fresh, modern."
開 means "open, begin, develop."
Open - To Make Accessible; to unlock.
Gap, Difference - A gap or difference between two things.
- : aprx. 1,900
新飼- Shinkai -
新改- Shinkai -
真 means "true, truth, pure."
Pure - Unadulterated; natural.
Accurate - Correct and precise.
Complete - Having all the necessary parts.
Unaltered - In its original form.
海 means "sea, ocean, vast."
- : aprx. 38
神 means "god, divine, spirit."
God - A Divine Being; the supreme creator of all things; heavenly deity.
Divine - Having supernatural powers beyond human comprehension; spiritual workings.
Spirit - The Soul; the spiritual essence; the heart and mind.
Excellence - The highest level of achievement.
Heart - The innermost part of a person.
Mysterious Work - Unfathomable and spiritual work.
Preciousness - Something of great value.
Soul - The spiritual essence of a person.
開 means "open, begin, develop."
Open - To Make Accessible; to unlock.
Gap, Difference - A gap or difference between two things.
- : aprx. 35
新界- Shinkai -
真 means "true, truth, pure."
Pure - Unadulterated; natural.
Accurate - Correct and precise.
Complete - Having all the necessary parts.
Unaltered - In its original form.
貝 means "shell, treasure, pattern."
- : aprx. 10
新解- Shinkai -
新 means "new, fresh, modern."
解 means "to solve, to untie, to understand."
Understand - To Comprehend; to grasp meaning.
Neglect, Omit - To fail to do something or take care of something.
Send, Deliver - To transport someone or something to a destination.
Unravel, Untangle - To separate something into its component parts.
- : under 10
慎 means "to be careful, modest, simple."
Modest - Reserved and calm demeanor.
Simple - Plain manner.
Cautious - Being careful and mindful.
Graceful - Elegant and refined manner.
Refined - Having a graceful and elegant quality.
Respectful - Being courteous and gentle.
改 means "to reform, to revise, to renew."
- : under 10
信 means "trust, faith, letter."
Faith - Confidence; belief.
Letter - A written message.
Shinano - An abbreviation for the Shinano region.
Sincerity - Being honest and truthful.
Stay - To remain in the same place for two nights.
開 means "open, begin, develop."
Open - To Make Accessible; to unlock.
Gap, Difference - A gap or difference between two things.
- : under 10
深 means "deep, profound, late."
Deep - Having great depth.
Profound - Having deep meaning.
Late - Advanced in time (night).
Dark - Having a deep or intense color.
Nightfall - The time when night begins.
Severe - Having a great degree of harshness or severity.
海 means "sea, ocean, vast."
- : under 10
愼 means "careful, discreet, modest."
Discreet - Being circumspect.
Modest - Humble and reserved.
Cautious - Being careful and mindful of one's actions.
Refined - Having a graceful and elegant demeanor.
Respectful - Being courteous and gentle.
Simple - Having a plain and unadorned lifestyle.
改 means "to reform, to revise, to renew."
- : under 10
新階- Shinkai -
新 means "new, fresh, modern."
階 means "stairs, floor, rank."
- : under 10
眞 means "true, truth, pure."
Pure - Unadulterated; sincere.
Appearance - Form, portrait, shape of an object.
Calligraphy - One of the writing styles.
貝 means "shell, treasure, pattern."
- : under 10
眞 means "true, truth, pure."
Pure - Unadulterated; sincere.
Appearance - Form, portrait, shape of an object.
Calligraphy - One of the writing styles.
海 means "sea, ocean, vast."
- : under 10
Real Persons
The list contains people mentioned in Wikipedia. All JP links are in Japanese only. Sorry!
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