AI VOX JAPAN has officially unified all Japanese voice dataset offerings previously provided through nihongo-data.com.
All professional voice data services are now offered exclusively under the AI VOX JAPAN brand.
Over 100 curated Japanese voices — freelance professionals and emerging talents — recorded under the supervision of veteran voice actors.
AI VOX JAPAN delivers authentic, studio-grade speech data with the speed and reliability trusted by global media and enterprises.
Professionally Supervised Japanese Voices for Production-Grade AI
With Japan’s largest curated network of over 200 voices, AI VOX JAPAN delivers diverse, emotionally rich, and studio-grade speech data. From experienced freelance professionals to outstanding emerging talents trained under professional supervision, our corpus provides the depth and reliability global AI leaders demand.
Unlike overseas providers who rely on generic or crowdsourced speech, we work with carefully selected Japanese voice talents — recorded and supervised by veteran voice actors — ensuring authenticity and cultural precision. This is the foundation for truly production-grade AI.
Start by listening to authentic Japanese voices — freelance professionals and emerging talents recorded under veteran supervision. Protected 10-second streaming demos let you instantly hear the quality. Full, unwatermarked recordings are available once licensing is in place.
Response within 2 business days. NDA available upon request.
Why AI VOX JAPAN Is Different
Unlike providers that rely on amateurs, we offer a curated collection of Japanese voices — freelance professionals and outstanding new talents — with every recording supervised by veteran voice actors. This is what makes AI VOX JAPAN unique.
The Industry Challenge
Most global AI voice data providers face a major limitation: they can only collect recordings from amateurs — Japanese speakers who happen to know some English, but lack professional training. This results in voices that may be sufficient for basic testing, but lack the authenticity, consistency, and performance quality required for production-grade AI.
AI VOX JAPAN Solves This Challenge
We bring together a curated roster of Japanese voices — freelance professionals and emerging talents — all recorded under the supervision of veteran voice actors.
Our network spans talents with experience across nationally broadcast programs, popular anime series, and leading Japanese media productions. Full credits are available under NDA.
Direct Japan Access
Working directly in Japan with native project management
Speed & Scale
Quickly collect large volumes of studio-grade, professionally supervised data
Industry Gateway
Project-managed access to Japan’s voice recording ecosystem with professional supervision
Conversational AI
With AI VOX JAPAN, conversational AI systems gain access to authentic Japanese honorifics and natural speech patterns that reflect cultural nuance. Our professionally recorded data helps customer support bots, virtual assistants, and chat systems sound more natural, polite, and human — creating better engagement and higher customer satisfaction.
Emotion Recognition
Our datasets include carefully annotated emotional variations across intensity levels — joy, anger, sadness, sarcasm, excitement, and more. This fine-grained labeling enables researchers and developers to train AI systems that don’t just speak, but also understand and reproduce emotion with human-like accuracy. From gaming avatars to healthcare assistants, emotion-aware AI becomes a reality with AI VOX JAPAN.
These numbers are more than just metrics — they represent the largest and most diverse curated Japanese voice collection for AI. With over 200 voices from freelance professionals and emerging talents, 15+ categories of nuanced emotions, and uncompromising studio quality under veteran supervision, AIVOX JAPAN delivers a licensed corpus you can trust for production-grade AI.
Voice Data Service
Premium Japanese Voice Data
Access to over 200 curated Japanese voices from freelance professionals and emerging talents. Studio-grade audio, emotion-labeled, and fully aligned for AI training.
A: Standard set includes joy, anger, sadness, fun, sarcastic — each with low/mid/high intensity. Custom tagging is available for enterprise clients.
Q2: Do you support dialects or special domains?
A: Yes. As add-ons under NDA, we provide regional dialects (e.g., Kansai, Tohoku) and specialized domains (medical, financial, technical) with trained professionals.
Q3: What audio formats and specifications do you support?
A: Default delivery is WAV 48kHz/24-bit. 44.1kHz or 96kHz options are available upon request.
Q4: Do you provide alignment files?
A: Yes. We provide TextGrid/JSON alignments at phoneme/mora level, precisely synchronized with audio for optimal training.
Q5: Do you offer customization for technical implementations?
A: Yes. We offer tailored solutions including specialized emotion labeling, custom script designs, and technical adaptations to meet specific integration needs for your AI voice models or applications.
