Japanese product interviews and lectures turn one speech stream into kanji, hiragana, and katakana without ordinary spaces marking every word boundary. Use ja for routing, then resolve homophones, personal names, counters, honorifics, and specialist katakana from subject context rather than sound alone.
Where this workflow fits
- Japanese interviews
- Recorded lectures
- Product research sessions
What to expect from Japanese audio
Japanese writing combines kanji, hiragana, and katakana without ordinary spaces between every word, while many spoken forms have multiple plausible written representations. The practical review targets are kanji choices, homophones, names, counters, honorifics, and technical katakana. The ja hint supports the frozen Japanese route; it does not select a preferred balance of kanji, hiragana, and katakana for every term.
Review the details that carry meaning
Homophones, names, counters, honorifics, and specialist katakana require contextual review. Use word-level playback for kanji choices, homophones, names, counters, honorifics, and technical katakana; a correction is accepted only when the surrounding clause and project convention support it.
Frozen deployment boundary
This page is published only because its language is present in capability snapshot m10-2026-07-20.1. It does not extend that catalog or claim a measured accuracy score.
- The ja hint supports the frozen Japanese route; it does not select a preferred balance of kanji, hiragana, and katakana for every term.
- Homophones, names, counters, honorifics, and specialist katakana require contextual review.
Reviewed provider capability
deepgram · nova-3
root ja · tiers fast, standard, precision
- Automatic detection
- Reviewed yes
- Diarization
- Reviewed yes
- Word timestamps
- Reviewed yes
Reviewed provider capability
assemblyai · universal-3-5-pro
root ja · tiers precision
- Automatic detection
- Reviewed yes
- Diarization
- Reviewed yes
- Word timestamps
- Reviewed yes
Reviewed provider capability
assemblyai · universal-2
root ja · tiers fast, standard, precision
- Automatic detection
- Reviewed yes
- Diarization
- Reviewed yes
- Word timestamps
- Reviewed yes
Questions from the workflow
How should I review a Japanese transcript?
Japanese writing combines kanji, hiragana, and katakana without ordinary spaces between every word, while many spoken forms have multiple plausible written representations. The ja hint supports the frozen Japanese route; it does not select a preferred balance of kanji, hiragana, and katakana for every term. The final pass targets kanji choices, homophones, names, counters, honorifics, and technical katakana, with unresolved words kept beside their source timestamps.
Reviewed sources
- IANA Language Subtag Registry · checked 2026-07-20
- AssemblyAI model and supported-language documentation · checked 2026-07-20
- AssemblyAI pre-recorded audio supported languages · checked 2026-07-20
- Unicode CLDR likely-subtags language and script data · checked 2026-07-20
- Japanese language and orthography editorial reference · checked 2026-07-20
- Deepgram models and languages overview · checked 2026-07-20