Isozaki Tetsuya
General Partners @ Femto Partners
Isozaki Tetsuya is a seed investor at Femto Partners focused on Fuel and Database. After graduating from the Faculty of Politics and Economics of Waseda University, established Isozaki Tetsuya Office in 2001 through the Chengin Research Institute and CFO of Netyear Group Co., Ltd.and became the representative. Since then, he served as Outside Director of kabu.com Securities Co., Ltd., Outside Auditor of Mixi Corporation, andLecturer at Chuo University Law School. Currently, Femto Growth Capital LLP is a general partner.
- Total investments:
- 5
- Last investment:
- Lead investor:
- 60%
Last updated:
For AI agents: llms.txt
Industries Isozaki Tetsuya invests in
Stages Isozaki Tetsuya invests in
Countries Isozaki Tetsuya invests in
Contacts
| Type | Contact | Validation |
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| Work email | ||
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| Work phone | ||
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Investment Focus
Industry
- Fuel 1 (20%)
- Database 1 (20%)
- Internet 1 (20%)
- Software 1 (20%)
- Communities 1 (20%)
Stage
- Seed 3 (60%)
- Funding Round 1 (20%)
- Venture - Series Unknown 1 (20%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Carbon Xtract develops and sells equipments and products that uses technology to remove carbon dioxide from the atmosphere. | Seed / Aug 14, 2026 | ||
| RoomClip is a photo-sharing service where users can find inspiration for their home and life. | $113.4M / Jul 03, 2017 | ||
| RoomClip is a photo-sharing service where users can find inspiration for their home and life. | $1.6M / Venture - Series Unknown / Nov 13, 2015 | ||
| Plaid the service provider does not have to analyze it using the service, such as data analysis, review the improvement plan, the only step on a separate step to reflect site. It is because the output for analysis and improvement of these services are divided. Therefore, you would have meant turning the PDCA high cost of resources andtime-consuming large. | Seed | ||
| RoomClip is a photo-sharing service where users can find inspiration for their home and life. | Seed |
Co-Investors
About Femto Partners
Femto Partners, a venture capital firm, focuses on early-stage startups in Japan. We are dedicated to nurturing and advancing startups poised to revolutionize existing industries.Our services include:· Providing strategic guidance · Assembling the ideal team · Growing the customer base · Attracting new investorsOur investments areshowing results.Two notable IPO’s are:PLAID, a CX platform and a leading SaaS company in Japan, committed to crafting exceptional customer experiences. https://plaid.co.jp/en/note, a C2C Content Platform that enables a wide range of creators, supporting the creator economy. https://ir.note.jp/enWe are deeply convinced of the transformative power of startups and work closely with entrepreneurs and management teams to achieve this vision.
Femto Partners Contacts
| Name | Phone | Socials | |
|---|---|---|---|
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Hiroshi Onose
Senior Manager
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Isozaki Tetsuya
General Partners
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Katsuhiko Okubo
Managing Partner
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Sakamoto Takanobu
Director
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Shingo Yamada
Principal
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FAQ
What does Isozaki Tetsuya invest in?
Isozaki Tetsuya invests primarily in Fuel, Database and Internet 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.
How do I contact Isozaki Tetsuya?
Public channels for Isozaki Tetsuya include Facebook. 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 Isozaki Tetsuya last invest?
The most recent investment recorded for Isozaki Tetsuya closed in Aug 2026. 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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