Transcribe Japanese audio with WhisperAI
WhisperAI transcribes Japanese (日本語) audio for the around 125 million native speakers, almost entirely concentrated in Japan who use the language across Japan, with significant heritage communities in Brazil, Hawaii, the US west coast and Peru. Built on OpenAI Whisper and tuned for the realities of Japanese speech, the service produces publication-grade transcripts in Mixed kanji (Chinese characters), hiragana and katakana, with romaji used for stylistic effect.
Three scripts, no spaces, and pitch-accent ambiguity
Japanese transcription has problems no European-language model has to solve: the writing system mixes kanji, hiragana and katakana with no spaces between words, and the language has hundreds of homophones disambiguated only by kanji choice (橋 hashi "bridge" vs 箸 hashi "chopsticks"). Whisper produces native mixed-script Japanese with appropriate kanji, correct katakana for loanwords, and segmentation that reads naturally — not romaji or kana-only output.
Standard Tokyo (Hyōjungo), Kansai-ben, Hakata-ben, Tōhoku-ben and Hokkaido speech are all supported.
What Japanese transcripts include
Native Mixed kanji (Chinese characters), hiragana and katakana, with romaji used for stylistic effect
Output in Mixed kanji (Chinese characters), hiragana and katakana, with romaji used for stylistic effect with all diacritics, tone marks, special characters and script-specific conventions preserved — never transliteration.
Speaker labels
Diarisation that separates and labels speakers in Japanese interviews, panels and multi-party meetings.
Timestamps and SRT
Word-level timestamps and SRT subtitle export for Japanese video captioning, with proper line-breaking for the script.
Editor and exports
In-browser editor with PDF, DOCX, TXT and SRT exports. Edit the transcript without leaving the browser, then download the format your downstream workflow expects.
How Japanese speakers actually use WhisperAI
- Enterprise meeting minutes (gijiroku)Japanese companies still produce formal meeting minutes called gijiroku for nearly every internal meeting. A clean Japanese transcript with proper keigo (honorific language) preserved cuts the gijiroku-writing burden significantly.
- Broadcast and streaming captionsJapan's broadcasting accessibility rules require captions on prime-time and most streaming content. Transcripts produce the SRT layer for editor finalisation.
- Kansai and regional dialect contentKansai-ben and other regional varieties are common in YouTube, podcasts and entertainment; Whisper transcribes them into readable mixed-script Japanese rather than collapsing to standard Tokyo speech.
- Bilingual Japanese-English business callsJapanese teams working with US or European partners run code-switched calls; the transcript correctly preserves both languages with appropriate scripts.
How to transcribe Japanese audio
Upload your Japanese recording
Drop in MP3, WAV, M4A, MP4 or similar — files up to 5GB. Long-form Japanese interviews, lectures and meetings work without splitting.
Whisper transcribes the audio
The model recognises Japanese speech across the dialects above and outputs Mixed kanji (Chinese characters), hiragana and katakana, with romaji used for stylistic effect. Code-switched English and other languages in the same recording are handled inline.
Edit, label and export
Open the transcript in the editor, fix any names or terms, label speakers, and export to PDF, DOCX, TXT or SRT. Optional AI summary surfaces the key points and decisions.
Who actually needs Japanese transcription
Japanese demand is dominated by enterprise meeting transcription (the Japanese corporate culture of long meetings produces enormous backlogs of audio) and broadcast/streaming captions, which are legally required for accessibility on most major platforms.
Dialects and varieties handled
- Hyōjungo (Standard Tokyo Japanese)
- Kansai-ben (Osaka, Kyoto, Kobe)
- Hakata-ben (Fukuoka)
- Tōhoku-ben
- Hokkaido-ben
- Okinawan / Uchinaaguchi
Transcription guides and best practices
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Start transcribing Japanese today
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