DirectInput and Japanese Keyboards
There are substantial differences between Japanese and U.S. keyboards. The chart below lists the additional keys that are available on each type of Japanese keyboard. It also lists the keys that are available on U.S. keyboards but are missing on the various Japanese keyboards.
Also note that on some NEC PC-98 keyboards, the DIK_CAPSLOCK and DIK_KANA keys are toggle buttons and not push buttons. These generate a down event when first pressed, then generate an up event when pressed a second time.
| Keyboard | Additional Keys | Missing Keys |
| DOS/V 106 Keyboard, NEC PC-98 106 Keyboard | DIK_AT, DIK_CIRCUMFLEX, DIK_COLON, DIK_CONVERT, DIK_KANA, DIK_KANJI, DIK_NOCONVERT, DIK_YEN | DIK_APOSTROPHE, DIK_EQUALS, DIK_GRAVE |
| NEC PC-98 Standard Keyboard, NEC PC-98 Laptop Keyboard | DIK_AT, DIK_CIRCUMFLEX, DIK_COLON, DIK_F13, DIK_F14, DIK_F15, DIK_KANA, DIK_KANJI, DIK_NOCONVERT, DIK_NUMPADCOMMA, DIK_NUMPADEQUALS, DIK_STOP, DIK_UNDERLINE, DIK_YEN | DIK_APOSTROPHE, DIK_BACKSLASH, DIK_EQUALS, DIK_GRAVE, DIK_NUMLOCK, DIK_NUMPADENTER, DIK_RCONTROL, DIK_RMENU, DIK_RSHIFT, DIK_SCROLL |
| AX Keyboard | DIK_AX, DIK_CONVERT, DIK_KANJI, DIK_NOCONVERT, DIK_YEN | DIK_RCONTROL, DIK_RMENU |
| J-3100 Keyboard | DIK_KANA, DIK_KANJI, DIK_NOLABEL, DIK_YEN | DIK_RCONTROL, DIK_RMENU |