Here are kanji variants:
- 海 (as an image: )
In case it does not display correctly for you, the first kanji is unicode U+FA45.
海 considered a variant of the much more common
海? Or, are
海 just considered mutual variants of each other?
More broadly, do you say that the most frequently used version of a kanji with a variant is "the" kanji? And that the kanji that is much less frequently used is the variant?
Also: What about rare cases such as
歳, both of which are very frequently used?