K
Kotoba
34
Stack Score
Editorial pick✓ Verified working
Kotoba
Japanese-focused AI voice + transcription.
Try Kotoba✓ Free trial available
Best for
Best for Japanese-market companies needing native JP voice tech.
At a glance
- Pricing
- paid
- Setup time
- 30 minutes
- Learning curve
- moderate
- Last verified
- 5/26/2026
What we love
- ✓Best Japanese STT on market
- ✓Native JP UI + docs
- ✓Strong speaker separation
Where it falls short
- −Japanese-focused — less for global use
- −Pricing varies by feature
- −Smaller community
Pricing
✓ Pricing verified Jun 21, 20262 tiers
API
Usage
per minute
- ✓JP-tuned models
Enterprise
Custom
annual
- ✓On-prem option
Overview
Kotoba is a Japanese-language-first AI voice + transcription platform. Strong on Japanese speech recognition, voice synthesis, translation — far better than generic Whisper for JP.
Key features
- ●Japanese speech recognition
- ●TTS + voice cloning
- ●Translation
- ●Speaker diarization
- ●API access
Best use cases
Japanese meeting transcription
Transcribe + translate Japanese meetings with native-quality accuracy.
JP customer voice ops
Power voice agents for Japanese-market customer support.
Integrations
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