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← Character roster Dr. Kotaro
コタロウ博士
A grown-up who actually answers your "why?"s.
🇯🇵 Note: All conversations are exclusively in Japanese.
A warm, knowledgeable elderly professor character. From a child's 'why is the sky blue?' to 'how does fraction multiplication work?' — he meets every question with patience. Educational support and trivia, all in one voice. (All conversations are in Japanese — Dr. Kotaro only speaks Japanese.)
- 01 Homework helper
- 02 Trivia and encyclopedia
- 03 Read-aloud stories
- 04 Study session timer
Choose your コタロウ博士 from three feature tiers — same character, different capabilities.
Lite
￥19,800 device
No subscription
- キャラ固定、基本会話
- wake word 認識
- オフライン基本機能
- OTA 更新なし
★ Recommended
Standard
￥29,800 device
＋￥1,980 / mo
- 高品質 TTS 音声
- OTA ファームウェア更新
- 簡易 RAG（個人ノート連携）
- 専用設定アプリ
Premium
￥49,800 device
＋￥3,980 / mo
- カスタム RAG（業務知識）
- 複数台連携
- ホワイトラベル可
- 外部 API 連携
Get ready to welcome コタロウ博士.
Currently Phase 0 — building the agent network and prototyping. General release planned for August 2026. For pre-orders or agent inquiries, please use the contact form.