# Gaku Saito

> Gaku Saito is a seed investor at Protoption backing Finance and Cryptocurrency. See 1 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Protoption](https://shizune.co/investors/profile/protoption)
- Total investments: 1
- Last investment: Apr 2019
- Lead investor: 0%
- Last updated: Aug 2026

Gaku Saito is a seed investor at Protoption focused on Finance and Cryptocurrency. Graduated from the University of Tokyo Faculty of Engineering , Graduate School of Engineering 2007 Graduated from the University of Tokyo Graduate School of Engineering April 2007 Joined Goldman Sachs Securities. He is engaged in a variety of investments, from non-performing loan investment, private equity investment, real estate investment toship investment, in the strategic investment department, which is a proprietary investment team. May 2010 Moved to Goldman Sachs Investment Partners to become an investor at his own discretion. Participate in a global hedge fund with total assets of over 800 billion yen, and as a hedge fund manager, invest and manage up to 80 billion portfolios in stocks, bonds, foreign exchange, interest rates, CDS, derivatives, loans, etc. February 2019 Appointed Cryptact Co., Ltd.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Finance | 1 | 100% |
| Cryptocurrency | 1 | 100% |
| Asset Management | 1 | 100% |
| Financial Services | 1 | 100% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Gaia Japan | Gaia is a Financial based Company | $14.2M | Seed | Apr 16, 2019 |  |

1 of 1 investments shown.

## Co-investors
- [NOW Japan](https://shizune.co/investors/profile/now-inc) — VC Fund, 1 deal together
- [Remixpoint](https://shizune.co/investors/profile/remixpoint) — VC Fund, 1 deal together

## About Protoption

VC Fund



1 contacts available at Protoption.

| Name | Title | Profile |
| --- | --- | --- |
| Gaku Saito | CEO | https://shizune.co/investors/profile/gaku-saito |

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## FAQ

### What does Gaku Saito invest in?

Gaku Saito invests primarily in Finance, Cryptocurrency and Asset Management startups, most often at Seed stage. Most of the 1 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Gaku Saito last invest?

The most recent investment recorded for Gaku Saito closed in Apr 2019. Shizune tracks 1 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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