Japanese Text to Speech API
Add natural Japanese voice generation to your product with a single HTTP request. Send Japanese text, get back lifelike MP3 audio — no SDK required, works with any language or framework.
Japanese is spoken by around 125 million people and mixes three writing systems (kanji, hiragana, katakana), which makes accurate pronunciation a real test for TTS. LyreWave reads mixed-script text naturally.
Quick example
Convert Japanese text to speech in one request:
curl -X POST https://lyrewave.com/api/v1/text-to-speech/CwhRBWXzGAHq8TQ4Fs17 \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"text":"LyreWave へようこそ。オールインワンの AI 音声スタジオです。","model_id":"premium"}' \
--output japanese-speech.mp3The text field above is real Japanese: “LyreWave へようこそ。オールインワンの AI 音声スタジオです。”
Endpoints
POST /api/v1/text-to-speech/{voice_id} — Japanese text → speech
GET /api/v1/voices — list available voices
POST /api/v1/speech-to-text — transcribe Japanese audio
Models: express, balanced, premium.
Get your Japanese TTS API key
API access is granted on request. Sign in, tell us what you’re building, and we’ll enable your account with free credits to start.
Japanese text to speech API — FAQ
Is there a free Japanese text to speech API?
Yes. LyreWave offers a Japanese text-to-speech API with free credits on signup — no credit card required. You send Japanese text in a single HTTP request and get back natural MP3 audio.
How do I convert Japanese text to speech with an API?
Request an API key, then POST your Japanese text to /api/v1/text-to-speech/{voice_id} with your key in the Authorization header. The response is a ready-to-use MP3 audio stream.
Which voices and models are available for Japanese?
LyreWave provides dozens of natural voices that speak Japanese, across three quality tiers — express, balanced, and premium. List available voices via GET /api/v1/voices.
Can I use the Japanese TTS API in a commercial product?
Yes. Generated Japanese audio can be used in videos, apps, IVR systems, e-learning and other commercial projects. Access is granted on request — apply from the developer page.