Spiral Capital
VC Fund
Tokyo, Japan
Spiral Capital is a venture capital fund.
- Total investments:
- 112
- Last investment:
- Lead investor:
- 27%
- Fund size:
- $92M
- Last fund:
Last updated:
For AI agents: llms.txt
Industries Spiral Capital invests in
Stages Spiral Capital invests in
Countries Spiral Capital invests in
Round sizes
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Round size
- Seed
- $874k–$9.3M
- Series A
- $1.1M–$63M
- Series B
- $3.9M–$47M
Investment Focus
Industry
- Software 16 (14%)
- Information Technology 13 (12%)
- Internet 9 (8%)
- Apps 7 (6%)
- Consulting 7 (6%)
Stage
- Series A 25 (22%)
- Series B 21 (19%)
- Seed 20 (18%)
- Venture - Series Unknown 19 (17%)
- Funding Round 7 (6%)
Country
- Japan 76 (68%)
- United Kingdom 1 (1%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Akitomo Naoi
Senior Associate
|
Senior Associate | Total investments: 8 | Find email | |
Hiroshi Oka
Representative Partner
|
Representative Partner | Total investments: 14 | Find email | |
Shuzo Ueki
Associate
|
Associate | Total investments: 5 | Find email |
Investments
| Company | Description | Round | Links |
|---|---|---|---|
|
Kiviaq
|
$971.4K / Seed / Sep 14, 2026 | ||
| POLASTECH promotes structural transformation in energy-intensive industries, including data centers, by integrating materials technology and systems technology. | $911.8K / Seed / Sep 09, 2026 | ||
| Power Laser is a startup company that offers a range of power laser technologies and applications. The company develops high-power laser systems, related components, and software for advanced industrial and scientific applications. Its mission, “Power lasers open the future,” reflects its focus on next-generation photonics and precision laserinnovation for manufacturing and research sectors. | $7.5M / Series A / Sep 02, 2026 | ||
| AZUL Energy is a next-generation energy device that improves air battery performance, develops air battery-related products, and proposes eco-friendly and comfortable new lifestyles. They discovered that a catalyst electrode containing one of these pigments performed better than platinum carbon or existing catalyst electrode materials. | Series A / Jul 30, 2026 | ||
| MOZU operates a construction materials procurement platform. | $8M / Series B / Jul 09, 2026 | ||
| WAKA is a studio that produces metaverse games and specializes in contract development for domestic businesses. | $1.6M / Seed / May 31, 2026 | ||
| Monochrome is creating a home operating system in order to power the next generation of energy-producing homes and roofs. The company is based in Chuo Ward, Tokyo. | $10.7M / Series B / Apr 22, 2026 | ||
| Zevero is a decarbonisation platform built to help companies of all sizes and industries measure, reduce and report on their emissions. | $7M / Seed / Mar 24, 2026 | ||
| bellFace is an InsideSales System specialized targetted for Business to business sales customer support.No log in, no installation required. No matter where you are, it connects in 5 seconds becacuse it operates in the browser (patented). The audio system is connected through the telephone lines, there is no interruption like with Web meetingsystems. bellFace which is specific to sales, comes with document sharing and script function, so your experience is just like face to face communication . It is also suited for inside sales. | $4.8M / Jan 19, 2026 | ||
| H2 Corporation offers an automation solution called "AI Estimation" for estimating tasks. | Seed / Dec 26, 2025 | ||
| See all 112 investments → | |||
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FAQ
What does Spiral Capital invest in?
Spiral Capital invests primarily in Software, Information Technology and Internet startups, most often at Series A and Series B stage. Most of the 112 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Spiral Capital's check size?
Spiral Capital typically joins rounds of $874k–$9.3M at Seed, $1.1M–$63M at Series A and $3.9M–$47M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Spiral Capital participates in.
How do I contact Spiral Capital?
Public channels for Spiral Capital include the website linked on this profile and 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.
Who are the partners at Spiral Capital?
The team at Spiral Capital includes Akitomo Naoi (Senior Associate), Hiroshi Oka (Representative Partner) and Shuzo Ueki (Associate). The Team section lists each member with their title, investment count and links.
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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