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Speech shouldn't stop where language does.

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Kotoba brings together researchers, engineers, and builders working at the frontier of generative AI to make real-time speech translation widely accessible.

Building on deep research in large-scale language models and speech systems, we develop speech AI for natural communication across languages, with particular expertise in East Asian languages.

5J%6&¥X

Kotoba brings together researchers, engineers, and builders working at the frontier of generative AI to make real-time speech translation widely accessible.

Building on deep research in large-scale language models and speech systems, we develop speech AI for natural communication across languages, with particular expertise in East Asian languages.

5J%6&¥X

Meet the founders

View profile

Co-Founder, CEO

Noriyuki Kojima

Co-Founder, CEO

Noriyuki Kojima

Co-Founder, CEO

Noriyuki Kojima

Noriyuki holds a PhD in Computer Science from Cornell University. His research focuses on natural language processing, computer vision, and large language models.
He received the Best Paper Award at EMNLP 2022 and co-founded the LLM Fugaku project, a cross-institutional initiative in Japan using the Fugaku supercomputer.
Previously worked at Facebook and Hugging Face. Fellow of the Masason Foundation.

Co-Founder, CTO

Jungo Kasai

Co-Founder, CTO

Jungo Kasai

Co-Founder, CTO

Jungo Kasai

Jungo holds a PhD in Computer Science from the University of Washington and was an Assistant Professor at TTIC (Toyota Technological Institute at Chicago). He's a leading NLP researcher whose work is widely cited and published at top conferences. Previously interned at Facebook, Microsoft, IBM, and the Allen Institute for AI. Recipient of the Best Paper Award at NAACL 2022. Fellow of the Masason Foundation and Funai Overseas Scholarship.

View profile

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Help us build a borderless world

We're always on the lookout for talented technical people to help us develop frontier speech AI technology

TOKYO

Jun 19, 2026

Customer Success Manager

TOKYO

Jun 17, 2026

Product marketing manager

TOKYO

Jun 16, 2026

Infrastructure Engineer

9/K56¥W

5/JY%&=$W

San Francisco, USA

Headquarters

NAME

Kotoba Technologies, Inc.

ADDRESS

Levi’s Plaza, 1160 Battery St Suite 100, San Francisco
CA 94111, USA

Levi’s Plaza, 1160 Battery St Suite 100, San Francisco, CA 94111, USA

INCORPORATION

July 2023

Tokyo, Japan

Operations

NAME

Kotoba Technologies Japan K.K.

ADDRESS

Otemachi Building 6F, 1-6-1 Otemachi, Chiyoda-ku,
Tokyo 100-0004, Japan

Otemachi Building 6F, 1-6-1 Otemachi, Chiyoda-ku, Tokyo 100-0004, Japan

INCORPORATION

October 2023

Select Language

English

Select Language

English

Select Language

English

Speech shouldn't stop where language does.

Speech shouldn't stop where language does.

Speech shouldn't stop where language does.

Kotoba brings together researchers, engineers, and builders working at the frontier of generative AI to make real-time speech translation widely accessible.

Kotoba brings together researchers, engineers, and builders working at the frontier of generative AI to make real-time speech translation widely accessible.

Meet the founders

Noriyuki Kojima

Noriyuki Kojima

Noriyuki Kojima

Jungo Kasai

Jungo Kasai

Jungo Kasai

Help us build a borderless world

Customer Success Manager

Product marketing manager

Infrastructure Engineer

Headquarters

Kotoba Technologies, Inc.

Operations

Kotoba Technologies Japan K.K.

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