Raysum Acquires Office Building in Tokyo’s Kita-Shinagawa

Raysum acquired Central Shinagawa Gotenyama, an office building in Kita-Shinagawa 6-chome, Shinagawa Ward, Tokyo, in March 2026. The seller was Daiichikosho Co., which operates businesses including commercial karaoke systems and had used the property as one of its offices. Daiichikosho acquired the property in 2016.

The property is located on a corner site fronting Sony-dori Avenue, a nine-minute walk from Osaki Station and a 10-minute walk from Gotanda Station. Completed in 1992, the seven-story office building has a typical floor plate of approximately 334 tsubo (approx. 11,900 sq. ft.).

From February to March 2026, the seller, Daiichikosho, consolidated offices that had been dispersed across three locations in Shinagawa Ward into the Daiichikosho Head Office Building, formerly Prime Takanawa Gateway, in Mita 3-chome, Minato Ward. In connection with the consolidation, Daiichikosho sold its former head office building in Kita-Shinagawa 5-chome to Mitsubishi Estate, and the sale of this property also appears to be related to the office consolidation.

The buyer, Raysum, is a Hulic subsidiary engaged in value-add real estate businesses. In March 2026, the company also acquired three properties in the Minami-Aoyama area, where large-scale redevelopment projects are underway in the surrounding area.（see related article:Raysum Acquires Two Adjacent Properties in Minami-Aoyama, Minato Ward） In the Osaki Station area, large-scale office developments such as Osaki River Walk Garden are in progress, and this transaction can be viewed as a move to acquire an existing midsize office building located at a key junction between Osaki, Gotanda and Shinagawa.

Key Facts

• Property Name: Central Shinagawa Gotenyama
• Buyer: Raysum Co.
• Seller: Daiichikosho Co.
• Location: 6-5-27 Kita-Shinagawa, Shinagawa Ward, Tokyo
• Nearest Stations: Nine-minute walk from Osaki Station on JR lines; 10-minute walk from Gotanda Station on JR lines and the Toei Asakusa Line; 13-minute walk from Kita-Shinagawa Station on the Keikyu Main Line; 15-minute walk from Shinagawa Station on JR lines
• Acquisition Date: March 31, 2026
• Completion: June 1992
• Number of Floors: 7F / B1; reinforced concrete and steel-frame construction
• Area: Typical Floor Plate: Approximately 334 tsubo (approx. 11,900 sq. ft.); Gross Floor Area: Approximately 2,166 tsubo (approx. 77,100 sq. ft.)