# SIIF

> SIIF is a VC fund in Minato backing SNS, Apps and Medical. See 7 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Minato, Japan
- Total investments: 7
- Last investment: Jul 2024
- Lead investor: 14%
- Last updated: Aug 2026
- Website: http://www.siif.or.jp/en

SIIF is a VC fund in Minato focused on SNS and Apps. SIIF aims to identify and support projects that contribute to the solution of social issues.

## Contacts

5 contacts available for SIIF. Shizune tracks 1 team members at SIIF. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/siif?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Series A | $645k–$1.3M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| SNS | 1 | 14% |
| Apps | 1 | 14% |
| Medical | 1 | 14% |
| Children | 1 | 14% |
| Software | 1 | 14% |

19 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 2 | 29% |
| Venture - Series Unknown | 2 | 29% |
| Series D | 1 | 14% |
| Funding Round | 1 | 14% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Mitsumasa Aoyagi | Managing Director | 1 | https://shizune.co/investors/profile/mitsumasa-aoyagi |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| AiCAN | AiCAN provides system planning and development, data analysis, IT, and consulting services related to child welfare. | $1.3M | Series A | Jul 01, 2024 |  |
| Cocohole Japan | kokohore Japan offers advertising services intended to help companies sell their products. They provide custom-made promotion planning, provide the content to the media to plan and manage owned media, and assist in product development, providing businesses with the assistance they need to survive. |  | Venture - Series Unknown | Mar 25, 2021 |  |
| CureApp | CureApp is a digital health startup.The firm is one of the leading players in the medical app vertical under the theme of “app exhibits therapeutic effects against diseases” and launched a nicotine addiction treatment app in February 2015, which was jointly developed with Division of Pulmonary Medicine, Keio University’s School of Medicine. It iscurrently conducting clinical trials in many locations. | $19.3M | Series D | Mar 12, 2021 |  |
| A10 Lab | A10 Lab is a company that aims to make people happy with technology that is independent of Sony's new business creation program. It provides Google Play with an app that allows users to do things that they have never been able to do with the custom app 'Min Chale' selected for two consecutive years. It is a company that bringsprofits to companies by improving lifetime value sales through the habitation of users that companies have. |  | Venture - Series Unknown | Jul 01, 2020 |  |
| Address | ADDress is a provider of co-living spaces in both urban and rural areas, enabling people to live in a range of luxurious residences at fixed prices. | $645.1K | Series A | Jan 31, 2020 |  |
| Address | ADDress is a provider of co-living spaces in both urban and rural areas, enabling people to live in a range of luxurious residences at fixed prices. | $645.1K | Series A | Jan 31, 2020 |  |
| Address | ADDress is a provider of co-living spaces in both urban and rural areas, enabling people to live in a range of luxurious residences at fixed prices. | $9.9M |  | Dec 20, 2019 |  |

7 of 7 investments shown.

## Co-investors
- [IT-Farm](https://shizune.co/investors/profile/it-farm) — VC Fund, 3 deals together
- [Renoveru](https://shizune.co/investors/profile/renoveru) — VC Fund, 3 deals together
- [Japan Finance Corporation](https://shizune.co/investors/profile/japan-finance-corporation) — VC Fund, 2 deals together
- [Japan Finance Corporation](https://shizune.co/investors/profile/japan-finance-corporation-54d8) — VC Fund, 2 deals together
- [Healthcare Innovation](https://shizune.co/investors/profile/healthcare-innovation) — VC Fund, 1 deal together
- [ITOCHU Technology Ventures](https://shizune.co/investors/profile/itochu-technology-ventures) — VC Fund, 1 deal together

## Similar investors

### Similar industry
- [Praxis](https://shizune.co/investors/profile/praxis-2) — VC Fund
- [Social and Sustainable Capital](https://shizune.co/investors/profile/social-and-sustainable-capital) — VC Fund
- [Antler](https://shizune.co/investors/profile/antler-be9c) — 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
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — 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
- [Construction Investors in Japan](https://shizune.co/investors/construction-investors-japan)
- [Construction VC Funds in Japan](https://shizune.co/investors/construction-vc-funds-japan)
- [Social Impact Investors](https://shizune.co/investors/social-impact-investors)
- [Social Impact VC Funds](https://shizune.co/investors/social-impact-vc-funds)
- [Social Impact Investors in Asia](https://shizune.co/investors/social-impact-investors-asia)
- [Social Impact Investors in Japan](https://shizune.co/investors/social-impact-investors-japan)

## FAQ

### What does SIIF invest in?

SIIF invests primarily in SNS, Apps and Medical startups, most often at Series A and Venture - Series Unknown stage. Most of the 7 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is SIIF's check size?

SIIF typically joins rounds of $645k–$1.3M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds SIIF participates in.

### How do I contact SIIF?

Public channels for SIIF include the website linked on this profile. 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 SIIF?

The team at SIIF includes Mitsumasa Aoyagi (Managing Director). 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 Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

# About Shizune
Shizune.co is an investor database. Core features:
- 48,091 startup investors (angels, VCs, accelerators, and others)
- Email, phone, LinkedIn (for intros), socials, and other contact data
- Updated daily from public funding news
- CSV and Excel export

The User can access the full database FOR FREE after signing up: shizune.co