Kotoba Technologies

About Kotoba Technologies

Kotoba Technologies is a cross-border startup founded by Dr. Noriyuki Kojima and Dr. Jungo Kasai, who hold PhDs in AI from top US universities. The company focuses on pioneering Japan's generative AI development with cutting-edge speech AI, aiming to create a borderless future through advanced language and voice technologies. Their journey began with the development of a Japanese-centric large language model (LLM) using the supercomputer Fugaku, and they strive to bridge the gap in generative AI adoption between English and non-English languages.

Products & Services

Simultaneous Translation:End-to-End voice translation and dubbing with voice cloning and emotion reflection capabilities.

Kotoba-SpeechGen:Generates fluent and natural Japanese TTS (Text-to-Speech) beyond conventional models, with voice cloning using personal voice or audio files. Plans for multilingual support including English and Southeast Asian languages.

Speech to-Text:Ultra-fast Japanese ASR (Automatic Speech Recognition) model, 6.3 times faster than Open AI Whisper, with a bilingual version for End-to-End Japanese-English bidirectional voice-to-text translation.

Specialties

Speech AI Generative AI Natural Language Processing (NLP) Voice Cloning Simultaneous Translation Text-to-Speech (TTS) Speech-to-Text (ASR) High-Performance Computing (HPC)

Funding History

Debug: View Raw Funding Data

#	Type	Amount Fields	Date Fields	Investors
1	RT: Seed 2 T: - FT: Seed 2	A: 11830000 MR: - FA: USD 11.83 million FAN: 11830000	D: 2025-08-05 FD: 2025-08-05	5 investors

Seed 2 Latest

2025-08-05

$11.8M

5 investors (Pro only)

Growth Metrics

+45%

Employee Growth

YoY

3.2x

Funding Growth

Last Round

12

Markets

Operating

10K+

Customers

Active

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Team & Leadership

小

小島熙之

Co-Founder, CEO

K

Kojima Noriyuki

Co-Founder, CEO

笠

笠井淳吾

Co-Founder, CTO

K

Kasai Jungo

Co-Founder, CTO

紀

紀貫之

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