If you ever find yourself stuck relying on the IME built-into Emacs (rather than the IME native to your OS), here are the essential key strokes you’ll need to know.
C-\: toggle input mode (ime on or off)C-h: shows conversion options if used when in conversion modeSPC: transform input to kanji, or show the next conversion candidateDEL: abort conversionC-n: show the next conversion candidateC-p: show the previous conversion candidateC-o: lengthen conversion bunsetsuC-i,TAB: shorten conversion bunsetsuShift-k: toggle between hiragana and katakanaqq: toggle between alphabet and kanji modesqz: turn on zenkaku alphabet modeqh: turn off zenkaku alphabet mode
Also useful:
C-x RET l: set the buffer language environmentC-x RET f: select the encodingC-x RET C-\: select the input method