Greater Tokyo existing-condo slowdown deepens as inventory rises
Greater Tokyo's existing condominium market showed clearer signs of rebalancing in August, with REINS-reported contracts falling for a fifth consecutive month while inventory rose for a sixth according to new data released September 10th.
The Real Estate Information Network for East Japan (REINS) recorded 3,180 reported contracts in August, down 10.5% year on year. Inventory rose 8.2% to 48,235 units, while new registrations increased 9.7% to 15,627.
The combination is more important than any one monthly decline. Inventory returned to year-on-year growth in March, reported contracts turned negative in April, and reported contract prices followed in May.
That pattern is consistent with a market becoming harder to absorb at the pace seen previously, although it does not prove that weaker activity caused subsequent price declines.
More properties are entering while reported contracts weaken
August total on-market inventory growth reflects both increased supply and weaker reported transaction activity.
New registrations rose for a third consecutive month, while reported contracts fell 10.5%.
The contract series should be interpreted carefully. REINS does not capture every Greater Tokyo transaction, and higher-budget transactions are much less represented in broker-reported contract data.
That makes REINS most useful for tracking direction within the segment it captures, rather than as a complete measure of all Greater Tokyo sales activity.
Reported prices have weakened, but the signal is narrower
Average reported contract price fell 2.8% year on year in August to JPY 51.29 million, while reported price per square meter fell 3.8% to JPY 816,000.
Both measurements have now declined for four straight months.
Property mix has influence. Average contracted floor area increased 1.0%, but average building age rose to 28.29 years from 26.28 years a year earlier.
The geographic picture reinforces a cautious approach. Contracts fell 20.6% in the Tokyo 23 wards, 9.5% in Tokyo non-23 wards and 9.2% in Kanagawa.
Yet reported price per square meter remained higher year on year in Tokyo’s non-23 wards, Saitama and Chiba.
What could have changed for sellers
For sellers, the most important shift is that ambitious pricing receives less protection from scarcity.
Inventory is rising while reported contract activity is weakening. Buyers therefore have more competing properties to consider, increasing the risk that an overpriced listing remains exposed longer and faces competition from newer stock.
That doesn’t mean sellers must cut prices, or that buyers will suddenly find widespread bargains. Greater Tokyo condominiums remain expensive, and stronger upper-end segments may not be fully reflected in the REINS contract data.
The August evidence is best read as a meaningful rebalancing in the broader broker-reported market, not confirmation of a uniform downturn.
If inventory continues rising while reported contracts remain below previous year levels, the case for a more durable slowdown will strengthen.
On the other hand, If activity recovers and inventory stabilizes, the recent pattern may instead prove to beinormalization from unusually tight conditions.
Further Reading:
East Japan REINS Monthly Market Watch - August 2026 (Japanese only)
