A box used in the Japanese section of kanji (Chinese characters) entries, to show and link to the shinjitai (新字体) and kyūjitai (旧字体) forms.
Parameter 1 is for the shinjitai and parameter 2 for the kyūjitai, e.g. {{ja-kanji forms|学|學}}
. If they are unified in Unicode, use {{ja-kanji forms|k=y}}
to exhibit the latter with a Korean font (see 海 for an example).