Company Profile
This is the organizational structure of Firstbrain Group.
| Group Name | Firstbrain Group ![]() |
|---|---|
| Main Organizations |
|
| Address | Mercury Square 4F, 4-33-2 Yotsuya, Shinjuku-ku, Tokyo |
| Representative | Tax Accountant / Administrative Scrivener / Licensed Real Estate Transaction Agent Toshihiro Hayase |
| Business | Corporate consulting, tax accounting, inheritance and business succession, real estate consulting, and overseas workforce support |

Representative Message
We aim to be a professional group that stays close to each client's decisions.
Challenges related to corporate management and asset building cannot be solved from a tax perspective alone. Company numbers, the representative's personal assets, inheritance and business succession, real estate, and workforce matters are all connected, and a single decision can significantly affect the future.
Building on our tax and accounting expertise, we carefully organize the circumstances of business owners, their families, employees, and business partners, and value presenting the best options judged from a comprehensive perspective.
Firstbrain Group connects expertise across multiple fields and supports clients as they take the next step with confidence. We remain committed to being a trusted professional partner over the long term.
Access
Mercury Square 4F, 4-33-2 Yotsuya, Shinjuku-ku, Tokyo
6 minutes walk from Shinjuku-gyoemmae Station, Tokyo Metro Marunouchi Line

