Masahiro Yamashiro
Angel Investor
Masahiro Yamashiro is a seed investor focused on B2C and SaaS. Masahiro Yamashiro is the Co-Representative of Growth Camp.
- Total investments:
- 5
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Masahiro Yamashiro invests in
Stages Masahiro Yamashiro invests in
Countries Masahiro Yamashiro invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $695k–$740k
Investment Focus
Industry
- B2C 1 (20%)
- SaaS 1 (20%)
- Music 1 (20%)
- Sports 1 (20%)
- Chatbot 1 (20%)
Stage
- Seed 3 (60%)
- Funding Round 2 (40%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| 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 is an app that provides 1on1 chatting services with favorite player of the users. | $344.7K / Dec 13, 2024 | ||
| 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 provides a cloud based platform for product management helping customers to improve productivity & creativity in product development. | $739.7K / Seed / Jun 01, 2021 | ||
| Only One is a travel agency specialized in Latin American destinations run by Japanese managers. | $644.4K |
Co-Investors
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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 round sizes does Masahiro Yamashiro invest in?
Masahiro Yamashiro typically joins rounds of $695k–$740k at Seed. These are whole funding-round sizes, not Masahiro Yamashiro's own check, which is rarely disclosed: the 10th–90th percentile of the confirmed public funding rounds Masahiro Yamashiro took part in.
How do I contact Masahiro Yamashiro?
Public channels for Masahiro Yamashiro include LinkedIn and X (Twitter). For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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