With the philosophy “Thinking of happiness. Creating happiness.”, we place our focus on people and life, continuously creating homes and communities worth living in.
By integrating multiple fields — from real estate and construction to hospitality and energy — all companies within the Group operate as a unified entity. With the aim of maximizing corporate value and fostering sustainable development, we continue to pursue our mission of becoming a corporation that “brings happiness to people and to the future of the Earth.”

MIRARTH Holdings Inc – Official Website
- Business Field: Management of Group companies
- Address: 16F, Tekko Building, 1-8-2 Marunouchi, Chiyoda-ku, Tokyo
- Tel: 03-6551-2125
- Fax: 03-6551-2126
- Representative: Representative Director Kazuichi Shimada
- Established: September 1972
- Capital: 9,056 million yen
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Takara Leben Co., Ltd – Official Website
- Business Fields: Planning, development, and sales of newly built condominium properties; property liquidation; leasing; and real estate distribution
- Address: 1-8-2 Marunouchi, Chiyoda-ku, Tokyo
- Telephone: 03-6551-2100 (Main)
- Fax: 03-6551-2109
- Representative: Representative Director Shoichi Akisawa
- Established: August 1989
- Capital: 400 million yen
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Leben Community Co., Ltd – Official Website
- Business Fields: Property management, leasing, insurance agency
- Address: 13F, Shiba Park A Building, 2-4-1 Shibakoen, Minato-ku, Tokyo
- Telephone: 0120-901-135
- Fax: 03-6890-7710
- Representative: Representative Director Shinsuke Naka
- Established: April 1988
- Capital: 60 million yen
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