Kosuke

Kosuke's email & phone

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CEO at Toolchain|Tokyo, Tokyo, Japan

Position:

CEO at Toolchain

Location:

Tokyo, Tokyo, Japan

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Last updated: 2026-05-06
Updated: 2026-05-06

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Work Experience 8 years

CEO at Toolchain

Aug 2024 - Current

ソフトウェアエンジニア at Voidsoftware

Jan 2023 - Jul 2024

ソフトウェアエンジニア at NTT OSS Center

Apr 2022 - Dec 2022

ソフトウェアエンジニア at NTT DATA

Apr 2021 - Mar 2022

ソフトウェアエンジニア at Goldman Sachs

Feb 2018 - Mar 2021

Kosuke started working in 2018, then the employee has changed 4 companies and 1 job. On average, Kosuke works for one company for 1 year 7 months.

Education

Bachelor of Science - BS at California State University-Sacramento

Associate of Science - AS at Sierra College

Frequently Asked Questions

What is Kosuke's email address?

SignalHire found a verified business email address for Kosuke: k*****-@toolchain.com.

What is Kosuke's phone number?

SignalHire found a verified phone number for Kosuke: +81-***-***-4149.

How do I contact Kosuke at Toolchain?

You can reach Kosuke through SignalHire by unlocking their verified email and direct phone number (free signup, no credit card needed). SignalHire is the fastest route if you need their contact details immediately.

What is Kosuke's professional background?

Kosuke has 8 years of professional experience. They have held roles including ソフトウェアエンジニア, ソフトウェアエンジニア, and ソフトウェアエンジニア at companies such as Voidsoftware, NTT OSS Center, and NTT DATA. Their education includes Bachelor of Science - BS from California State University-Sacramento, and Associate of Science - AS from Sierra College.

Is Kosuke's contact information up to date?

Yes. Kosuke's SignalHire profile was last updated on 6 May 2026, reflecting their current position as CEO at Toolchain in San Francisco, California, United States.

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