# Suneight Investment

Suneight Investment is a Venture Capital / Private Equity based in Tokyo, Japan.

## Overview

- **Organization type:** Venture Capital / Private Equity
- **Headquarters:** Tokyo, Japan
- **Region:** Asia
- **Address:** Tokyo, Japan
- **Founded:** 2004
- **Assets under management:** Undisclosed
- **Website:** www.sun-8.jp
- **LinkedIn:** https://linkedin.com/company/suneight-investment

## Regulatory record

- **Reports private funds:** No

## About

Suneight Investment is an independent venture capital firm that supports business development at all stages. The firm has made 31 investments, including a Series A - II investment in Niro on May 10, 2024. Suneight Investment has facilitated 6 portfolio exits, with Tokyo Otaku Mode exiting on November 21, 2023.

## Sectors

- Enterprise Software
- Internet & Digital Media
- Real Estate
- Consumer Tech
- Digital Health
- IoT & Hardware

## People

- Masahide Katsukata — Representative Director
- Koji Watanabe — Director
- Atsushi Nohara — Director

## Questions

### How does Suneight Investment source proprietary deal flow?

Suneight draws on director-level networks built over decades in Japanese and US venture markets. Katsukata's nearly nine years at JAFCO provide access to Japan's startup ecosystem, while Watanabe's tenure at Worldview Technology Partners in Silicon Valley opens a US-sourced pipeline, particularly in semiconductors, security, and enterprise technology. The firm's track record of 13 IPOs across three exchanges also attracts repeat founders and local intermediaries.

### Does Suneight Investment participate in fund commitments or only direct deals?

The firm primarily makes direct investments, both in private companies and in structured real assets. There is no public record of Suneight acting as a limited partner in third-party funds. Its model relies on direct exposure to operating companies and property vehicles, with Katsukata's personal track record counting 13 direct IPO exits.

### What investment stages does Suneight Investment typically target?

Suneight explicitly covers the full lifecycle: early stage (seed and start-up), expansion and late stage, and management buyouts. Its venture practice overlaps with growth-stage positions that lead to IPOs on Tokyo, New York, and Hong Kong exchanges, while its real-asset arm engages in development and pre-IPO structured vehicles.

## Related profiles

- [Sundowner Capital Management](https://altss.com/profile/sundowner-capital-management)
- [Sunel Securities](https://altss.com/profile/sunel-securities)

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Last updated: 2026-06-03T20:00:00.000Z

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