What 海 means
It is the sea character 海 in a Japanese compatibility form.
海 means sea or ocean; 海 keeps that meaning in a separate form tied to a Japanese source standard.
JIS X 0213:2000 assigns it a Japanese source position so conversion into Unicode and back can preserve the distinction. This dates the encoding record, not the first appearance of the underlying character. Unicode also records a Japanese variation sequence—海 plus an invisible selector—that requests this glyph without changing the word.
Why does 海 look different from 海?
They carry the same meaning; fonts control how different they look.
海 and 海 have distinct code points but the same sea-or-ocean meaning. The compatibility form preserves a Japanese source distinction.
A Japanese font can draw the forms distinctly. A Chinese or generic font can make them look alike or show 海 using another regional glyph. That is a rendering difference, not a different word.
Specialist and archival: it marks a Japanese source-format distinction that may need to survive conversion.
For ordinary sea or ocean text, use 海; compatibility normalization can fold 海 into it.
Who writes 海
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Don't confuse it with
1
Questions people ask
1Why did 海 change to 海?
Normalization can cause that. Unicode's NFKC and NFKD forms apply compatibility decomposition, so software using either can turn 海 into 海.
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8
How to type or find 海
- Search it as
- fa45 · u+fa45 · jis x 0213 · japanese variant · 海 variant · compatibility ideograph · unicode fa45 · 海 character
- Shows up in
- Anything that takes text · its shape is whatever your font draws
海\FA45海 represents this character; the selected font must still support its glyph.Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.