# Keisuke Sogawa

> Keisuke Sogawa is a seed investor at WebPay (San Francisco) backing Apps and Software. See 3 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [WebPay](https://shizune.co/investors/profile/webpay)
- Location: San Francisco, United States
- Total investments: 3
- Last investment: Jan 2021
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/pub/keisuke-sogawa/32/725/520
- X (Twitter): http://twitter.com/sowawa
- Facebook: http://www.facebook.com/sowawa

Keisuke Sogawa is a seed investor at WebPay in San Francisco focused on Apps and Software. Keisuke Sogawa completed his studies at the Graduate School of Informatics at Kyoto University and joined an IPA Mitou Youth in 2011. He went on to launch WebPay at FluxFlex in Silicon Valley. As the Chief Technology Officer of WebPay, he developed the service infrastructure for credit card payment services. He also worked on the LINE Pay businessas part of the LINE Group after LINE acquired his company. He joined Mercari Group in June 2017. After serving as Merpay CTO and Mercari CISO, he took up his current position as Merpay & Mercoin CISO.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $482k–$28M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Apps | 1 | 33% |
| Software | 1 | 33% |
| E-Commerce | 1 | 33% |
| Manufacturing | 1 | 33% |
| Information Technology | 1 | 33% |

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 67% |
| Funding Round | 1 | 33% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| HarvestX | HarvestX manufactures fully automatic robots which contributes to the shortage of agricultural human resources and stable food production | $6.9M |  | Jan 18, 2021 |  |
| HarvestX | HarvestX manufactures fully automatic robots which contributes to the shortage of agricultural human resources and stable food production | $482.1K | Seed | Jan 18, 2021 |  |
| Appify Technologies | Appify Technologies operates a no-code development service that enables users to create personal e-commerce applications. | $28.3M | Seed | Oct 12, 2020 |  |

3 of 3 investments shown.

## Co-investors
- [ANRI](https://shizune.co/investors/profile/anri) — VC Fund, 2 deals together
- [UTokyo Innovation Platform](https://shizune.co/investors/profile/utokyo-innovation-platform) — VC Fund, 2 deals together
- [East Ventures](https://shizune.co/investors/profile/east-ventures) — VC Fund, 1 deal together
- [GREE Ventures](https://shizune.co/investors/profile/gree-ventures-e73a) — VC Fund, 1 deal together

## About WebPay

VC Fund · Tokyo, Japan

WebPay (formerly known as Fluxflex). Fluxflex develops a scalable shared web hosting service for LAMP applications with automated file sync system between user's local computers and its ready-to-use testing servers to let users prepare for nothing to start developing web services. Also, the user can reflect the modification of his applicationto its production environment of auto-scaling distributed multi-layered servers with just one single command.

2 contacts available at WebPay.

| Name | Title | Profile |
| --- | --- | --- |
| Kei Kubo | CEO | https://shizune.co/investors/profile/kei-kubo |
| Keisuke Sogawa | CTO | https://shizune.co/investors/profile/keisuke-sogawa |

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## FAQ

### What does Keisuke Sogawa invest in?

Keisuke Sogawa invests primarily in Apps, Software and E-Commerce startups, most often at Seed and Funding Round stage. Most of the 3 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Keisuke Sogawa's check size?

Keisuke Sogawa typically joins rounds of $482k–$28M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Keisuke Sogawa participates in.

### When did Keisuke Sogawa last invest?

The most recent investment recorded for Keisuke Sogawa closed in Jan 2021. Shizune tracks 3 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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