Land prices / Saitama / Ageo
2025 published land transactionsKoyama land prices and price trends
This page aggregates publicly released transactions classified as residential land (land only) for the address area Koyama, Ageo. It does not limit transactions by the buyer's intended use.
Koyama location
Koyama location map
The orange point is the neighborhood representative point. Green points are stations within 1.5 km straight-line distance.
Select a station marker or label to open its station-area page. Overlapping labels appear when the marker is selected.
Price distribution (2025)
Estimated land price by plot size (2025)
| Plot size | Equivalent in tsubo | Median estimate | Middle 50% estimate |
|---|---|---|---|
| 50.0 m² | 15.1 tsubo | JPY 7.87M | JPY 6.35M – JPY 8.47M |
| 100.0 m² | 30.3 tsubo | JPY 15.73M | JPY 12.71M – JPY 16.94M |
| 150.0 m² | 45.4 tsubo | JPY 23.6M | JPY 19.06M – JPY 25.41M |
| 200.0 m² | 60.5 tsubo | JPY 31.46M | JPY 25.41M – JPY 33.88M |
These are simple land-only estimates calculated from the displayed median and quartile price per m², not medians of transactions at each plot size.
Land-price trend
| Year | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Public transactions | 3 Indicative | 3 Indicative | 8 Indicative | 6 Indicative | 5 Indicative |
| Official observations | 1 | 1 | 1 | 1 | 1 |
Medians and changes can move sharply in years with few transactions.
The displayed period change compares transaction medians in 2021 and 2025. Published transactions and official residential land-price observations are separate series.
Latest official residential land-price observations: 1.
Published land transactions (2025)
| Period | Area | Price | Price / m² | Road width | Zoning |
|---|---|---|---|---|---|
| 2025-10 | 170.0 m² | JPY 29M | JPY 169,400 / m²JPY 169.4K / m² | 17 m | Residential use |
| 2025-07 | 1900.0 m² | JPY 230M | JPY 117,975 / m²JPY 117.975K / m² | 40 m | |
| 2025-07 | 1000.0 m² | JPY 130M | JPY 127,050 / m²JPY 127.05K / m² | 27 m | Residential use |
| 2025-04 | 125.0 m² | JPY 24M | JPY 196,625 / m²JPY 196.625K / m² | 10 m | Residential use |
| 2025-01 | 145.0 m² | JPY 23M | JPY 157,300 / m²JPY 157.3K / m² | 9.7 m | Residential use |
Transactions are listed newest first. They are not filtered by residential intent or buyer type. Low unit price alone is not treated as atypical. “Value check” is limited to invalid values or extremely high unit prices and does not necessarily indicate an error.
Koyama land-price summary
The median published transaction price in Koyama for 2025 is JPY 157,300 / m²JPY 157.3K / m². A 100 m² plot would therefore be about JPY 15.73M by simple multiplication. The period-change figure compares yearly transaction medians in 2021 and 2025.