About 4 min read









AI character you can meet by voice. Real-time voice conversation in Japanese, English, and Chinese with lip-sync avatar. For language learning and roleplay.
Automatically translated from Japanese by AI
About 4 min readKotonia is an AI character platform where you can have voice conversations. Select from public personas and chat via text or voice. With response times of approximately 1-2 seconds, you can engage in real-time conversations with lip-sync avatars that support Japanese, English, and Chinese.
・Real-time voice conversation (low-latency pipeline)
・Avatar with synchronized mouth movements
・Integrated multi-model AI chat / code execution agent / image and video studio
・Character memory and personality persist, allowing relationships to develop
Designed for experiences you'll use repeatedly—language learning, role-play, companion characters, and more. Free tier available; paid plans start from ¥3,000/month. No installation required; runs in your browser.
■Demo Video
https://youtu.be/gubxZYryWq8
■Try It Out
https://kotonia.ai/?utm_source=tsukutta&utm_medium=referral&utm_campaign=product-listing
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