Sanshin Jyuken Acquires Taiju Life Waseda Building in Bunkyo-ku
Sanshin Jyuken acquired Taiju Life Waseda Building, an office property in Sekiguchi 1-chome, Bunkyo-ku, Tokyo, on May 29, 2026. The seller was Taiju Life Insurance.
Completed in 1987, the building rises six floors above ground with one basement level and has a typical floor plate of approximately 217 tsubo (approx. 7,700 sq. ft.). It fronts Shin-Mejiro-dori, an eight-minute walk from Waseda Station on the Tokyo Metro Tozai Line and a 10-minute walk from Edogawabashi Station on the Tokyo Metro Yurakucho Line.
The vacancy rate for office buildings of all grades within a 10-minute walk of Waseda Station has hovered around 2% since 2024 and stood at approximately 2.1% as of July 2026 (compiled by the editorial team based on estie office research).
Taiju Life, the seller, relocated its headquarters to Shiodome City Center in Minato-ku in December 2025, consolidating head-office functions that had been spread across four locations in Daiba, Otemachi, Waseda and Kohinata. The sale of this building comes roughly six months after that move.
Buyer Sanshin Jyuken is a real estate company centered on condominium development that handles land acquisition, planning, development, construction, sales and management, and has extended its business into rental housing and mixed-use projects. In February 2026 it entered a capital and business alliance with ITOCHU Corporation, saying it would pursue collaboration in real estate development and expand its existing business areas.
Key Facts
- Property Name: Taiju Life Waseda Building
- Buyer: Sanshin Jyuken Co., Ltd.
- Seller: TAIJU LIFE INSURANCE COMPANY LIMITED
- Acquisition Date: May 29, 2026
- Location: 1-33-2 Sekiguchi, Bunkyo-ku, Tokyo
- Nearest Station(s): Eight-minute walk from Waseda Station on the Tokyo Metro Tozai Line / 10-minute walk from Edogawabashi Station on the Tokyo Metro Yurakucho Line
- Completion: February 1987
- Number of Floors: 6F / B1 (reinforced concrete construction)
- Area: Typical floor plate of approximately 217 tsubo (approx. 7,700 sq. ft.) / Gross Floor Area of approximately 1,849 tsubo (approx. 65,800 sq. ft.)
