Continuing the discussion from Virtual Character Keyboard Blocking Input Text (Chinese Japanese Korean):
There is still this bug about Japanese typing. With Japanese IME, after converting Hiragana characters into Kanji on the title bar, the prompt automatically moves to the note and copy file name to it.
OS : macOS catalina (10.15.7)
IME : Google 日本語入力
Obsidian : insider v0.9.15 (installer v0.9.3)
Related Bug report