# Masahiro Samejima

> Masahiro Samejima is a startup investor at Challenergy. See 0 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Challenergy](https://shizune.co/investors/profile/challenergy)
- Last updated: Aug 2026

Masahiro Samejima is a startup investor at Challenergy. Masahiro Samejima - Counsel @ Challenergy

## About Challenergy

VC Fund · Tokyo, Japan

Challenergy is developing new type of wind turbine, Magnus VAWT.

5 contacts available at Challenergy.

| Name | Title | Profile |
| --- | --- | --- |
| Masahiro Samejima | Counsel | https://shizune.co/investors/profile/masahiro-samejima |
| Atsushi Shimizu | CEO | https://shizune.co/investors/profile/atsushi-shimizu-4c09 |
| Mizumoto Jido | Executive Officer / CSO | https://shizune.co/investors/profile/mizumoto-jido |
| Shimizu Atsushi | Founder & Chairman & CEO | https://shizune.co/investors/profile/shimizu-atsushi |
| Shingo Koyama | Director CTO | https://shizune.co/investors/profile/shingo-koyama |

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