# Soichiro Kawai

> Soichiro Kawai is a seed investor at ReBoost (Tokyo) backing Media and Entertainment and Internet. See 18 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [ReBoost](https://shizune.co/investors/profile/reboost)
- Location: Tokyo, Japan
- Total investments: 18
- Last investment: Dec 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/soichiro-kawai-54a54612
- X (Twitter): https://twitter.com/sou23
- Website: https://x.com/sou23
- Facebook: https://www.facebook.com/souichirou.kawai

Soichiro Kawai is a seed investor at ReBoost in Tokyo focused on Media and Entertainment and Internet. Soichiro Kawai - CEO @ ReBoost

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $278k–$30M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Media and Entertainment | 3 | 17% |
| Internet | 2 | 11% |
| Mobile Apps | 2 | 11% |
| Human Resources | 2 | 11% |
| Information Technology | 2 | 11% |

35 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 11 | 61% |
| Funding Round | 4 | 22% |
| Angel | 1 | 6% |
| Series A | 1 | 6% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Back Dooor | Back Dooor is an app that provides 1on1 chatting services with favorite player of the users. | $344.7K |  | Dec 13, 2024 |  |
| Villio | Villio provides talent experience SaaS which helps companies with human resource development and recruitment of talented engineers. |  | Seed | Jun 23, 2021 |  |
| SPeak | SPeak is an IT services firm that operates web content and matching platforms for global talents. It operates JPort Match, which is involved in direct recruiting services. It is a global career platform for budding new talents. | $11.3M |  | May 20, 2021 |  |
| SPeak | SPeak is an IT services firm that operates web content and matching platforms for global talents. It operates JPort Match, which is involved in direct recruiting services. It is a global career platform for budding new talents. | $734.9K | Seed | May 20, 2021 |  |
| 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 |  |
| SHAREDINE | SHAREDINE is a subscription service for traveling chefs for pregnancy, before and after childbirth, baby food, lifestyle-related diseases, muscle training, and diabetes. They offer corporate benefits and wellness services, such as organizing meal seminars and dispatching cooking services for people. The on-site chefs at ShareDine are food expertswith credentials such as registered dietitians and cooks. There are approximately 1,600 registered visiting chefs with various specialties, including those who have experience with nutritional guidance and cooking in nursery school cafeterias and hospitals, as well as those who have experience cooking in hotel and restaurant kitchens. A traveling chef will also carefully advise them on cooking points such as recipes, preparation, and setup for them to replicate at home. | $2M | Seed | Jul 05, 2020 |  |
| digzyme | Digzyme develops new enzymatic processes using bioinformatics. The company automates various stages of analysis related to the development of enzymes and bioprocesses using their core bioinformatics technology and further optimize using accumulated data. | $278.3K | Seed | May 29, 2020 |  |
| FamiOne | FamiOne is creating a society that will support the future of couples who want to receive children. | $1.4M | Series A | Apr 06, 2020 |  |
| Robes, Inc. | Robes, Inc. is a provider of planning, development and operation of Internet services. |  | Seed | Oct 16, 2019 |  |

10 of 18 investments shown.

## Co-investors
- [ANRI](https://shizune.co/investors/profile/anri) — VC Fund, 6 deals together
- [CyberAgent Capital](https://shizune.co/investors/profile/cyberagent) — VC Fund, 3 deals together
- [Headline Asia (formerly Infinity Ventures)](https://shizune.co/investors/profile/infinity) — VC Fund, 2 deals together
- [Lifetime Ventures](https://shizune.co/investors/profile/lifetime-ventures) — VC Fund, 2 deals together
- [First Light Capital](https://shizune.co/investors/profile/ub-ventures) — VC Fund, 2 deals together
- [UTokyo Innovation Platform](https://shizune.co/investors/profile/utokyo-innovation-platform) — VC Fund, 2 deals together

## About ReBoost

VC Fund · Tokyo, Japan

ReBoost specializes in recruiting and training business.

1 contacts available at ReBoost.

| Name | Title | Profile |
| --- | --- | --- |
| Soichiro Kawai | CEO | https://shizune.co/investors/profile/soichiro-kawai |

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## FAQ

### What does Soichiro Kawai invest in?

Soichiro Kawai invests primarily in Media and Entertainment, Internet and Mobile Apps startups, most often at Seed and Funding Round stage. Most of the 18 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Soichiro Kawai's check size?

Soichiro Kawai typically joins rounds of $278k–$30M 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 Soichiro Kawai participates in.

### When did Soichiro Kawai last invest?

The most recent investment recorded for Soichiro Kawai closed in Dec 2024. Shizune tracks 18 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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