# Masahiro Yamashiro

> Masahiro Yamashiro is a seed investor at Merpay backing B2C, SaaS and Music. See 5 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Merpay](https://shizune.co/investors/profile/merpay)
- Total investments: 5
- Last investment: Dec 2025
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/masahiro-yamashiro-095b964b/
- X (Twitter): https://twitter.com/yamashiro_1
- Website: https://x.com/yamashiro_1

Masahiro Yamashiro is a seed investor at Merpay focused on B2C and SaaS. Masahiro Yamashiro is the Co-Representative of Growth Camp.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $695k–$740k |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| B2C | 1 | 20% |
| SaaS | 1 | 20% |
| Music | 1 | 20% |
| Sports | 1 | 20% |
| Chatbot | 1 | 20% |

16 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 3 | 60% |
| Funding Round | 2 | 40% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Jizai | Jizai is a provider of artificial intelligence technology, offering AI solutions, software-as-a-service products powered by AI, and robots that utilize AI capabilities for businesses across various industries. The company focuses on generative AI, large language models (LLMs), and robotics, offering customizable AI platforms and automation tools.It also engages in AI consulting and research collaborations. |  | Seed | Dec 09, 2025 |  |
| Back Dooor | Back Dooor is an app that provides 1on1 chatting services with favorite player of the users. | $344.7K |  | Dec 13, 2024 |  |
| Recri | Recri works for the entertainment industry and specializes in operations management tasks like ticketing for stage, film, and music shows. | $694.6K | Seed | Aug 27, 2024 |  |
| Flyle | Flyle provides a cloud based platform for product management helping customers to improve productivity & creativity in product development. | $739.7K | Seed | Jun 01, 2021 |  |
| OnlyOne Travel | Only One is a travel agency specialized in Latin American destinations run by Japanese managers. | $644.4K |  |  |  |

5 of 5 investments shown.

## Co-investors
- [DRG FUND](https://shizune.co/investors/profile/drg-fund) — VC Fund, 1 deal together
- [NES Venture Capital](https://shizune.co/investors/profile/nes-venture-capital) — VC Fund, 1 deal together
- [Salesforce Ventures](https://shizune.co/investors/profile/salesforce-ventures) — VC Fund, 1 deal together
- [First Light Capital](https://shizune.co/investors/profile/ub-ventures) — VC Fund, 1 deal together
- [UNITED](https://shizune.co/investors/profile/united-inc) — VC Fund, 1 deal together

## About Merpay

VC Fund · Tokyo, Japan

Merpay is a fintech start up.

5 contacts available at Merpay.

| Name | Title | Profile |
| --- | --- | --- |
| Hideo Kimura | Executive Officer, VP of Engineering | https://shizune.co/investors/profile/hideo-kimura |
| Karuna Murti | Technical Lead | https://shizune.co/investors/profile/karuna-murti-2 |
| Keisuke Sogawa | Director CTO | https://shizune.co/investors/profile/keisuke-sogawa |
| Kim Goeun | VP of Sales & Business Development | https://shizune.co/investors/profile/kim-goeun |
| Masahiro Yamashiro | Director Head of Marketing and Growth | https://shizune.co/investors/profile/masahiro-yamashiro |

## Similar investors

### Similar industry
- [Warner Music Group](https://shizune.co/investors/profile/warner-music-group) — VC Fund
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Goodwater Capital](https://shizune.co/investors/profile/goodwater-capital) — VC Fund

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

### Similar country
- [Mitsubishi UFJ Capital](https://shizune.co/investors/profile/mitsubishi-ufj-capital) — VC Fund
- [SMBC Venture Capital](https://shizune.co/investors/profile/smbc-venture-capital) — VC Fund
- [Mizuho Capital](https://shizune.co/investors/profile/mizuho-capital) — VC Fund

## Featured in investor lists
- [Music Investors in Japan](https://shizune.co/investors/music-investors-japan)
- [Music Angel Investors in Japan](https://shizune.co/investors/music-angel-investors-japan)
- [Consumer Angel Investors in Japan](https://shizune.co/investors/consumer-angel-investors-japan)
- [Music Angel Investors in Asia](https://shizune.co/investors/music-angel-investors-asia)

## FAQ

### What does Masahiro Yamashiro invest in?

Masahiro Yamashiro invests primarily in B2C, SaaS and Music startups, most often at Seed and Funding Round stage. Most of the 5 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Masahiro Yamashiro's check size?

Masahiro Yamashiro typically joins rounds of $695k–$740k 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 Masahiro Yamashiro participates in.

### When did Masahiro Yamashiro last invest?

The most recent investment recorded for Masahiro Yamashiro closed in Dec 2025. Shizune tracks 5 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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