# Terrasias Capital

Terrasias Capital is a Single Family Office based in Tokyo, Japan.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Tokyo, Japan
- **Region:** Asia
- **Address:** Level 27, Shiroyama Trust Tower 4-3-1 Toranomon, Minato-ku, Tokyo 105-6027, Japan
- **Founded:** 2012
- **Assets under management:** 75 (Altss estimate)
- **Website:** terrasias.com
- **LinkedIn:** https://www.linkedin.com/company/terrasias-capital-ltd/

## Regulatory record

- **Reports private funds:** No

## About

Terrasias Capital was established in 2012 by Ikuko Yamanaka. The firm serves as the dedicated vehicle for the Yamanaka family's multigenerational wealth. Its headquarters sit in central Tokyo. The office concentrates on alternative investments. Confirmed exposures include private equity, hedge funds, private credit, real estate, natural resources and intellectual property. Investment stages span buyout and growth. The firm executes through direct co-investments and SPVs. Geographic reach centers on Asia with additional natural resources holdings held globally. Real estate assets consist of mixed-use portfolios in Tokyo and Okinawa. Team size remains undisclosed. Stefan Nilsson serves as co-founder and director. Ikuko Yamanaka holds the roles of CEO and CIO. No additional offices appear in public records. The firm maintains board participation in the Japan-Sweden Society, the Swedish Chamber of Commerce and Industry in Japan, and the Tokyo American Club. Terrasias Capital operates as a pure single-family office without external capital vehicles. Governance ties directly to the Yamanaka family principals and their long-standing relationships in investment banking and asset management.

## Sectors

- Media & Entertainment
- ClimateTech

## People

- Ikuko Yamanaka — CEO and CIO
- Stefan Nilsson — Co-Founder and Director

## Questions

### Who runs investment decisions at Terrasias Capital?

Ikuko Yamanaka serves as CEO and CIO. Stefan Nilsson acts as co-founder and director with oversight responsibilities.

### What asset classes does Terrasias Capital deploy into?

The firm allocates across private equity, hedge funds, private credit, real estate, natural resources and intellectual property royalties.

### Does Terrasias Capital make fund commitments or direct investments?

It executes through direct co-investments and SPVs in addition to hedge fund and private equity fund exposure.

### Where does the underlying wealth originate?

The office manages the multigenerational wealth of the Yamanaka family.

### Which regions does Terrasias Capital target?

Primary focus remains Asia with additional global natural resources exposure.

## Related profiles

- [Stage Point Capital](https://altss.com/profile/stage-point-capital)
- [5AM Capital](https://altss.com/profile/5am-capital)

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

Canonical page: https://altss.com/profile/terrasias-capital-family-office-ikuko-yamanaka-family-office

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