Forty percent of Japan condominium stock is now over thirty years old
- Adam German
- 18 minutes ago
- 2 min read
Tokyo Kantei released the results of its analysis of condominium housing stock nationwide on January 29th.
The survey counted every condominium unit that had been built and still exists as of December 31, 2025.
This includes unsold units and shared spaces such as meeting rooms that are legally registered as part of a condominium. Buildings that had already been torn down were excluded.
Wix AI image using the prompt "Japan condominiums" using a Fantasy filter. All rights reserved.
The total number of condominium units nationwide stands at 7,795,763. By building age, units less than 10 years old accounted for 1,125,251 units (14.4%). Those aged 11-20 years totaled 1,498,954 units (19.2%), while units aged 21-30 years numbered 1,965,412 (25.2%).
Condominiums aged 31-40 years totaled 1,429,066 units (18.3%), and those over 40 years old reached 1,777,080 units (22.7%).
Combined, units more than 30 years old now account for over 40% of the total stock.
By prefecture, Tokyo recorded the largest condominium stock at 2,048,378 units, representing 26.2% of the national total.
Kanagawa ranked second with 1,037,960 units, followed by Osaka with 896,069 units.
Compared with the previous year, only these three prefectures saw increases of more than 10,000 units.
Chiba Prefecture posted the highest share of condominiums aged over 40 years, at 30.1%. In key supply areas such as Chiba City and Ichikawa City, the share of units over 40 years old exceeded 30%, while in Chiba City’s Hanamigawa Ward the figure surpassed 50%.
Osaka followed with 27.1%, and Tokyo with 25.5%. Among the top 10 prefectures by total condominium stock, nine recorded shares of over-40-year-old units exceeding 20%.
Tokyo Kantei attributed this trend to the limited volume of new condominium supply in recent years, particularly in major metropolitan areas.
By contrast, Okinawa recorded the highest share of condominiums less than 10 years old, at 33.5%. At the lower end, Nara Prefecture stood at 6.3% and Niigata at 7.3%, with eight prefectures recording single-digit percentages.
At the municipal level, Tokyo’s Koto Ward had the largest condominium stock, with 132,149 units. Of these, 18.1% were less than 10 years old, while 22.5% were more than 40 years old.
Setagaya Ward followed with 115,176 units, and Ota Ward with 112,309 units. Outside Tokyo, the largest stock was recorded in Funabashi City, Chiba Prefecture, which ranked 12th nationwide with 71,022 units.
Further Reading:
Tokyo Kantei Nationwide Condominium Inventory White Paper (Japanese only; contains for granular data then that outlined above)
Sources:
R.E. Port News (Japanese only)
Tokyo Kantei White Paper Breakdowns (Japanese only)
