KAITRY data is used to analyze trends in official land prices centered on Ariake, Koto Ward, based on general market prices over the past 5 years. Residential land prices rose 2.1% nationwide, 3.2% in the Tokyo metropolitan area and 17.0% in Ariake, Koto Ward, according to reports.
This article examines trends in general market prices over 5 years in the Ariake area of Koto Ward, Tokyo, where official land prices underwent a significant change, using condominium Cases A, B and C. Condominium A rose from ¥66.70 million in 2022 to ¥90.40 million in 2026, with the price per tsubo moving from ¥3.15 million to ¥3.23 million, ¥3.51 million, ¥4.14 million and ¥4.27 million. Condominium B rose from ¥57.30 million in 2022 to ¥78.80 million in 2026, with the price per tsubo moving from ¥2.70 million to ¥2.80 million, ¥3.07 million, ¥3.62 million and ¥3.72 million. No property data matching the conditions for Condominium C, which is 30-45 years old, was available.
As background to trends in land prices and price movements, prices rose 1.0% nationwide, 3.2% in the Tokyo metropolitan area and 8.7% in Tokyo's 23 wards. Improved access to central Tokyo is reportedly driving up demand in surrounding areas. In addition, the surge in official land prices in the Ariake area is reflected in general market prices, while continued development and the appeal of the waterfront, both characteristic of the Tokyo Bay area, are cited as factors behind the price increases.
Finally, transportation infrastructure expansion plans are also under way in the target area. The extension of Metro Line 8 between Toyosu and Sumiyoshi is reportedly targeting an opening in the mid-2030s, while community development, including construction of a new government office building around Toyocho Station, is under discussion and could affect the area's future outlook.