Koshi City Housing Market Report 2025
Data updated 2026-11-10 · Source: MLIT transaction price survey, 2005 Q3–2026 Q2
Key figures for 2025
- Median house price (land + building)
- ¥28.0M
- Residential land per m² (sales)
- ¥27k/m²
- -35.4% over 5 years
- Transactions in 2025
- 165
- #5 of 19 areas in Kumamoto by price per m²
What the data says
Prices are still rising, but more slowly
Growth has cooled to about 0.1% a year, down from 1.6% a year in the previous five years. This looks more like a maturing market than a turning point, and it gives buyers a bit more room to negotiate.
Lagging Kumamoto
Per m², houses here are 64% above the Kumamoto average. The premium was 81% ten years ago, so the rest of Kumamoto has been catching up.
What a typical purchase costs
Half of all house sales last year were between ¥16.0M and ¥37.0M. Listings outside that range are either unusual properties or worth a closer look.
A growing population
The population grew 4.2% between 2020 and 2025 (−3.5% for the wider area). More people moved in than out in 2025, a net gain of about 5.6 per 1,000 residents, so demand for homes is being topped up by newcomers.
Few abandoned homes
7.6% of homes were empty in 2023 (14.9% for the wider area), and 3.1% were empty without being for rent, for sale or used as second homes. Most empty homes here are rentals between tenants, not abandoned houses, a sign of a healthy market.
Lower earthquake risk
The government's seismic model gives a 11% chance of shaking of intensity 6-lower or stronger in the next 30 years (15% for the wider area). This is low by Japanese standards, although no part of Japan is free of earthquake risk.
Official land prices are rising fast
On the government's fixed benchmark sites, which are valued the same way every year, residential land prices changed +6% in the year to January 2026 and +41% over five years. Because these sites don't change, this is the cleanest measure of land value trends.
Some flood or landslide exposure
Of the official land-price benchmark sites here, which sit in typical neighbourhoods, 57% are inside the worst-case flood zone. Most worst-case flood zones are shallow (under 0.5 m) at the edges, so depth matters as much as the share. Check the hazard map for any specific address before buying.
Living in Koshi City: people, homes and risks
- Population 2025
- 64,344
- +4.2% since 2020
- Kumamoto: -3.5%
- Net moves in 2025
- +361
- +5.61 per 1,000 residents
- Kumamoto: -1.39
- Vacant homes (2023)
- 7.6%
- 3.1% empty and not for rent or sale
- Kumamoto: 14.9%
- Median rent (2023)
- ¥54k
- per month, all rented homes
- Kumamoto: ¥47k
- Strong earthquake risk
- 11.1%
- chance of shaking of intensity 6-lower or more within 30 years
- Kumamoto: 14.9%
- Official land price 2026
- ¥56k/m²
- +6.3% in a year · +41.0% in 5 years
- Kumamoto: ¥54k/m²
- Flood exposure
- 57.1%
- of 7 benchmark sites in a worst-case flood zone (0.0% 3 m or deeper)
- Kumamoto: 51.3%
- Landslide exposure
- 0.0%
- of 7 benchmark sites in a landslide warning area
- Kumamoto: 0.8%
Check flood, landslide and tsunami zones for a specific address on the government hazard map ↗
Sources: 2025 Census (preliminary), 2025 Internal Migration Report, 2023 Housing and Land Survey (Statistics Bureau of Japan); J-SHIS seismic hazard model (NIED, 2024); Land Price Publication (MLIT). Earthquake probability is measured at the municipal center.
Example sales in Koshi City
Real transactions from the last four quarters, picked near the lower (20th percentile), middle and upper (80th percentile) price points. Locations are shown at district level, as published by MLIT.
House
¥13.0M
¥108k/m²
- Kikudomi
- Hikari no Mori · 23 min walk
- Land 240 m² · floor 120 m²
- Built 1978 (48 yrs) · Wood
¥22.0M
¥244k/m²
- Nonoshima
- Miyoshi(Kumamoto) · 26 min walk
- Land 260 m² · floor 90 m²
- Built 2025 (1 yrs) · Wood
¥35.0M
¥333k/m²
- Miyoshi
- Miyoshi(Kumamoto) · 6 min walk
- Land 200 m² · floor 105 m²
- Built 2025 (1 yrs) · Wood
Show data table
| Year | House |
|---|---|
| 2007 | ¥21.0M |
| 2008 | ¥22.0M |
| 2009 | ¥19.0M |
| 2010 | ¥18.0M |
| 2011 | ¥19.0M |
| 2012 | ¥21.0M |
| 2013 | ¥25.0M |
| 2014 | ¥24.0M |
| 2015 | ¥25.0M |
| 2016 | ¥20.0M |
| 2017 | ¥18.0M |
| 2018 | ¥23.0M |
| 2019 | ¥26.0M |
| 2020 | ¥31.0M |
| 2021 | ¥29.0M |
| 2022 | ¥28.0M |
| 2023 | ¥30.0M |
| 2024 | ¥30.0M |
| 2025 | ¥28.0M |
| 2026 (partial) | – |
Show data table
| Year | House | Land |
|---|---|---|
| 2007 | ¥161k/m² | ¥30k/m² |
| 2008 | ¥210k/m² | ¥31k/m² |
| 2009 | ¥154k/m² | ¥28k/m² |
| 2010 | ¥152k/m² | ¥25k/m² |
| 2011 | ¥156k/m² | ¥21k/m² |
| 2012 | ¥190k/m² | ¥30k/m² |
| 2013 | ¥164k/m² | ¥32k/m² |
| 2014 | ¥208k/m² | ¥26k/m² |
| 2015 | ¥225k/m² | ¥34k/m² |
| 2016 | ¥171k/m² | ¥34k/m² |
| 2017 | ¥146k/m² | ¥37k/m² |
| 2018 | ¥217k/m² | ¥32k/m² |
| 2019 | ¥212k/m² | ¥28k/m² |
| 2020 | ¥257k/m² | ¥41k/m² |
| 2021 | ¥262k/m² | ¥45k/m² |
| 2022 | ¥256k/m² | ¥47k/m² |
| 2023 | ¥250k/m² | ¥41k/m² |
| 2024 | ¥233k/m² | ¥26k/m² |
| 2025 | ¥238k/m² | ¥27k/m² |
| 2026 (partial) | – | ¥42k/m² |
Show data table
| Building age (years) | House |
|---|---|
| 0 | ¥332k/m² |
| 1 | ¥296k/m² |
| 42 | ¥105k/m² |
| 50 | ¥122k/m² |
Each line follows buildings from one construction period over time. 1981 is when Japan's current earthquake-resistance standard (shin-taishin) took effect.
Show data table
| Year | 1981-2000 | 2001-2010 | 2011-2020 |
|---|---|---|---|
| 2008 | – | ¥242k/m² | – |
| 2009 | – | ¥224k/m² | – |
| 2010 | ¥114k/m² | – | – |
| 2011 | ¥113k/m² | – | ¥224k/m² |
| 2012 | – | – | ¥238k/m² |
| 2013 | – | – | ¥255k/m² |
| 2014 | – | – | ¥280k/m² |
| 2015 | – | – | ¥257k/m² |
| 2017 | ¥119k/m² | – | ¥274k/m² |
| 2018 | – | – | ¥273k/m² |
| 2019 | – | – | ¥274k/m² |
| 2020 | ¥125k/m² | – | ¥286k/m² |
| 2025 | ¥143k/m² | – | – |
Prices near train stations in Koshi City
Sales from 2023–2025, grouped by nearest station.
| Station | Median used condo price | Condo price per m² | Median house price (land + building) | Walk (min) | Sales |
|---|---|---|---|---|---|
| Miyoshi(Kumamoto) (御代志) | – | – | ¥30.0M | 19 | 69 |
| Hikari no Mori (光の森) | – | – | ¥39.0M | 24 | 35 |
| Musashizuka (武蔵塚) | – | – | ¥25.0M | 29 | 22 |
| Suya (須屋) | – | – | ¥23.0M | 6 | 21 |
| Mitsuishi(Kumamoto) (三ツ石) | – | – | ¥21.0M | 10 | 21 |
| Kuroishi(Kumamoto) (黒石(熊本)) | – | – | ¥30.5M | 16 | 20 |
How much does a house cost in Koshi City?
The median house sale, including the land, was ¥28.0M in 2025 across 71 sales.
Are property prices in Koshi City going up?
Over the five years to 2025, residential land prices changed -35.4%.
About this data
Figures are medians of real transactions reported to Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) through its quarterly price survey. House prices per m² divide the total price (land and building) by the floor area. Medians based on fewer than 20 sales are not shown. The latest quarters are preliminary and are revised as more survey responses arrive.
Information only, not investment advice.