The new frontier in Japanese
text-to-speech
Create extraordinary voice experiences in Japanese and 60+ languages with expressive control, exceptional precision, instant voice cloning, and low-latency streaming.
Trusted by teams building global voice products
A new standard for Japanese AI speech
Japanese is spoken by over 125 million people worldwide primarily in Japan, with speakers around the world. Production text-to-speech for Japanese still breaks on the details that matter most: phone numbers get scrambled, names are mispronounced, and mixed-language text falls apart.
Soniox TTS handles the real-world patterns that other systems get wrong, delivering high-fidelity Japanese speech with robust pronunciation, precise rendering of alphanumerics, natural language switching, and low-latency streaming.
Exceptional quality in Japanese
Hear the same voice deliver natural, expressive speech in Japanese and across 60+ languages with consistent quality, identity, and pronunciation.
Hallucination-free Japanese speech generation
The Japanese text you send is exactly what gets spoken. No invented words, dropped content, or unexpected substitutions.
ご予約は6月3日午前9時45分で確定しました。
ご予約は6月3日午前9時45分で確定しました。
Alphanumerics spoken correctly in Japanese
Email addresses, phone numbers, addresses, IDs, and codes spoken clearly and precisely in Japanese.
プラスいちよんいちごごごごゼロいちさんに
Names pronounced naturally in Japanese
Handle person names, place names, brand names, and borrowed words with the pronunciation Japanese speakers expect.
bee · YON · say
Streaming Japanese speech before the sentence ends
Start generating Japanese speech from the first few words, before the full sentence is available, for low-latency voice agents and live systems.
もちろんです。ご予約の変更を承ります。ご希望の日はいつでしょうか。
Precise timing for every character
Character-level timestamps let applications synchronize Japanese text and audio, stop cleanly during interruptions, and continue from the correct point.
Seamless language switching with Japanese mid-sentence
Speak mixed-language text naturally in a single utterance, switching between Japanese and other languages with the right flow and pronunciation.
JapaneseEstimate your Japanese text-to-speech cost
Set your monthly generated speech volume to estimate your Soniox API cost for text-to-speech.
Pricing calculator
Stop overpaying for Japanese speech AI
1,000 hours of speech / month
Pricing assumptions
Based on public pay-as-you-go pricing. Enterprise discounts and committed-use contracts may differ. Some providers charge separately for certain features. The calculator uses the public price for the provider configuration that most closely matches Soniox.
Speech infrastructure for massive scale
Build on one API and deploy in your region
Use the same models and API everywhere, with in-region processing to meet latency, data residency, and regulatory requirements.
Available: US, EU, Japan, India
Coming soon: Korea, Australia, Canada, Saudi Arabia, UK, Brazil
Run mission-critical systems with confidence
- 99.9% uptime
Production-hardened infrastructure with monitoring and redundancy. - low-latency streaming
Process speech in real time with low latency for responsive voice applications. - Priority support
Severity-based incident response with direct access to the Soniox team.
"Before Soniox, our international users always had a noticeably different experience. Now accuracy and responsiveness match across all regions…it feels like one system instead of five."
Alon Yair CTO of Onvego
Japanese text-to-speech use cases
Soniox TTS is built for Japanese voice applications where latency, accuracy, and reliability matter as much as voice quality.
Voice agents
Deliver fast, natural Japanese spoken responses for voice agents that need to feel real-time, interruption-friendly, and production-ready.
Enterprise IVR and customer support
Modernize Japanese customer interactions with fast, high-fidelity voice. Speak account data, verification codes, and addresses accurately at scale.
High-stakes structured speech
Read phone numbers, emails, addresses, IDs, PINs, and account data exactly as written in Japanese, without scrambled digits or letters.
Multilingual communication
Power live multilingual experiences with Japanese speech generation. Handle language switching mid-sentence and pronounce foreign words and names correctly.
Accessibility and assistive voice tools
Create dependable Japanese voice experiences for reading assistants, communication tools, and accessibility products.
Media and content production
Generate Japanese voiceovers, narration, and audio content at scale, with accurate pronunciation of names and technical terms.
Start generating natural speech from ~$0.70 per hour of generated audio.
Go global with one API
Get production-ready text-to-speech in 60+ languages.
Privacy and compliance, built right in
Never stored, never saved.
Audio stays in memory, everything is processed in real-time.
Built for privacy-critical use cases.
Adhering to leading global security, privacy, and compliance standards.
Trusted where privacy matters most.
Used in industries where speech is sensitive, from healthcare to enterprise.
Frequently asked questions
Does Soniox support text-to-speech for Japanese?
How does Soniox TTS handle alphanumerics in Japanese?
Can Soniox TTS handle mixed-language text with Japanese?
How does Soniox TTS pronounce names and foreign words in Japanese?
Is Soniox TTS fast enough for real-time Japanese voice agents?
Where is Japanese speech data processed and stored?
Is Soniox TTS suitable for production Japanese workloads?
- low-latency streaming
- Production-hardened infrastructure
- Priority enterprise support
How do I get started?
Get started with the Soniox API
Create an account instantly, or contact us to design a custom package for your business.
Build with APIDocumentation
Get up and running in minutes and spend your time building, not wrestling with the API.
Explore docsSee what you’ll pay
Pay only for what you use with our flexible pricing. Built to scale with you.
Pricing details