Authentic Japanese text to speech
Discover lifelike Japanese text to speech with ultra-fast response times. Perfect for diverse applications and seamless integration.
Trusted by 50K+ Customers
Discover Japanese text to speech
Experience the full Audio AI platform powered by our state-of-the-art Sonic 2.0 model with over 200 expressive voices in 15 languages.
Follow complex transcripts accurately
Our Japanese text to speech technology ensures precise following of complex transcripts for clear audio output.
Instant Voice Clone
Clone your voice in Japanese and other languages with just 3 seconds of audio. Generate hours of audio content instantly with our text-to-speech technology.
Fine-grained control over speech
Gain fine-grained control over voice parameters with our Japanese voice generator for tailored audio experiences.
Easy to use API
Integrate Japanese text to speech effortlessly with our user-friendly API, designed for developers.
Make your content accessible to a global audience.
Sonic supports seamless speech in 15 languages, with more added every release.
15 Languages
From Japanese to German—any language you need, we’ve got it.
Localization
Localize a given voice to any accent or language.
What our customers say
Join the growing list of companies opting for Sonic.
"In 1999, Salesforce brought software to the cloud. In 2025, 11x is killing software as we know it and unleashing the era of digital workers. To realise this vision, we needed AI voice technology that feels truly human. Cartesia’s technology gives our AI digital workers reps the speed, reliability, and natural expressiveness required to engage customers at scale.
It's the only solution fit for our relentless drive toward innovation.”
Keith Fearon, Head of Product & Growth, 11x
"For a product like ours, every additional millisecond of latency matters because it directly correlates to patients hanging up. One dropped call is upwards of $5,000 in potential revenue for our practices. We knew we had to switch to Cartesia as our main provider when we saw that it was more than twice as fast as our existing one and the immediate impact to our customers' bottom line."
Abdul Jamjoom, Co-founder, Arini
"We're thrilled to partner with Cartesia - their technology has dramatically improved the accuracy and reliability of our call center agents. Beyond just providing best-in-class voice AI, the Cartesia team has been a true partner in helping us transform 24/7 patient support for over 215,000 patients. Their support has been instrumental in making exceptional care accessible anytime, anywhere."
Jeffrey Liu, Founder and co-CEO, Assort Health
How to use Japanese text to speech
Step One
Step 1: Choose or design a voice using our Japanese voice generator. Visit our voices page to explore options.
Step Two
Step 2: Create your script. We handle complex transcripts to give you more creative freedom.
Step Three
Step 3: Generate the audio using our Japanese text to speech feature. For conversations or longer script narrations, try our Narration feature.
Frequently Asked Questions
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