Diana Court Oimachi Suikei: A New Residential Complex in Shinagawa, Tokyo
Diana Court Oimachi Suikei is a new condominium development currently under construction in the Oi district of Shinagawa Ward, Tokyo. The project is scheduled for completion and handover in late March 2028, with sales planned to commence in late March 2026. The development comprises two buildings, a South and a North building, taking advantage of a highly independent site that faces public roads on both its southern and northern sides.
The property offers a range of layouts from 1LDK+S to 3LDK, with private floor areas spanning from 55.16㎡ to 138.83㎡. Balcony areas range from 4.74㎡ to 11.33㎡. Additional outdoor spaces include service balconies (1.62㎡ to 2.5㎡), roof balconies (9.92㎡ to 32.63㎡), and terraces (9.33㎡ to 9.58㎡). The total number of units is 43, which includes 11 units for members of a "Friends Association," 3 units not open for public sale, and 29 units for general sale.
Critical agent notes have been translated: Special Remarks on Sales Summary: "Until sales begin, no actions related to contracts, reservation acceptance, or securing application priority can be taken. The listed areas correspond to general sale units. The number of units and their corresponding areas will be announced in advertisements after the number of units for sale is determined." Additional Remarks: "The total number of units includes 11 units for Friends Association members and 3 units not open for recruitment, making 29 units for general sale. Balcony area: 4.74㎡～11.33㎡. Other areas: ■Service balcony area/1.62㎡～2.5㎡ ■Roof balcony area/9.92㎡～32.63㎡ ■Terrace area/9.33㎡～9.58㎡. Building Confirmation Number: JCIA Confirmation 25 No. 00488 (dated October 31, 2025). Affiliated Organizations: Full member of the Japan Housing Construction Industry Association, Tokyo Metropolitan Real Estate Fair Trade Council, Real Estate流通経営協会 member, Full member of the Real Estate Securitization Association."
The development emphasizes high-quality shared spaces. The entrance approach features steps that allow light to filter in, creating a sense of depth and openness. The spacious entrance hall, with large openings facing greenery, is designed as a relaxing area with sofas and wood finishes. A sky garden on the roof of the South building offers a place to enjoy views, surrounded by shrubs and featuring a symbolic tree and benches with indirect lighting. The site will be richly landscaped along public roads and in the central courtyard.
The area of Oi in Shinagawa is a well-established residential neighborhood with excellent transport links, being a 13-minute walk from JR Oimachi Station and a 9-minute walk from Keikyu Tatekawa Station. An interesting local fact is that the nearby Omori Kaizuka Koen (Omori Shell Mound Garden) preserves the site of one of Japan's first archaeological excavations from the Jomon period. The closest major landmark is the iconic Tokyo Tower, easily accessible via the JR Keihin-Tohoku Line, offering panoramic views of the metropolis.
