pure phonetic japanese transcription as hiragana/furigana or romaji (without kanjis)

[eadmaster]

performing the conversion after the transcription is much harder, as explained here.

Related:

• Convert option for none nativ speaker e.g Japanse to romaji rakuri255/UltraSinger#34
• [f. Request] Japanese into Romaji and into Kana in 'autotranslate' SubtitleEdit/subtitleedit#4669

[Manamama]

Tip: ask LLMs to do it (sic, I tried). They need lotsa context to do it well.