Harumi Island Triton Square View Tower stands at 1-6-1 Harumi in Chuo-ku, part of the Harumi Island Triton Square development. Completed in February 1998, it rises 50 storeys above two basement levels in steel, steel-reinforced concrete and reinforced concrete, with 624 residences. Management is fully outsourced to Sumisho Tatemono, with a caretaker on site. The most recent management report for the building (June 2026) records a repair reserve of about JPY 1.68 billion as of March 2026, no borrowing and a long-term repair plan prepared in 2022. Pets are permitted only on a written undertaking to follow the pet rules; office use is not permitted. Parking is listed as available at JPY 25,000–50,000 per month as of 17 September.

This residence is a 1SLDK of 55.27 sq m on the thirtieth floor. The plan provides an LDK of approximately 13.9 jo with a pantry, a bedroom of approximately 6.0 jo, a service room of approximately 4.5 jo, a walk-in closet, multi-purpose storage, an alcove and storage space at the entrance, and a separate 1216-size bathroom, powder room and toilet. An interior renovation is under way and is scheduled for completion on 22 January 2027, covering replacement of the kitchen, bathroom, washstand and toilet, wet-area flooring, new flooring, joinery and lighting, the electric water heater (with reheating), skirting and new wall coverings throughout with an accent wall covering, followed by house cleaning. The listed equipment includes a face-to-face kitchen with a dishwasher and a water purifier, and a bathroom with a drying unit and reheating. The residence is vacant, with handover by consultation.

The listing material notes Harumi Triton approximately 2 minutes on foot (about 120 m), Maruetsu Petit Harumi approximately 5 minutes (about 400 m), Tomod's Harumi Triton approximately 4 minutes (about 300 m) and the Harumi Rinkai Park waterside terrace approximately 11 minutes (about 850 m).