Japan ball banban · CC BY 3.0
The cut
819 metres, to scale.
A slice through Ichiukyo where it is deepest and narrowest, measured on the Copernicus relief model every 30 m. Same scale as the landmark standing on the floor.
Standing on the floor, to scale: Great Pyramid · 139 m · Empire State · 443 m
Depth is measured to the lower rim; the width is from rim to rim. A 30 m relief model smooths the narrowest walls, so a slot canyon reads shallower than it is.
819m
Depth
measured on the 30 m relief model
5.2km
Rim to rim
measured on the 30 m relief model
37°
Steepest wall
average over 300 m, from the relief
238m
Floor altitude
Rim to floor
6 °C warmer at the bottom.
In August the afternoon reaches 31 °C on the floor, against 25 °C on the rim. The best months to hike are from April to May and in October. The rim freezes at night from December to March. The wettest months are from June to September.
- 7°2°Jan
- 9°4°Feb
- 13°8°Mar
- 18°13°Apr
- 23°18°May
- 26°21°Jun
- 30°25°Jul
- 31°25°Aug
- 27°21°Sep
- 21°16°Oct
- 16°10°Nov
- 10°4°Dec
Afternoon highs, 1991–2020 averages (NASA POWER) brought to the altitude of the rim and of the floor with the standard lapse rate (6.5 °C per 1 000 m). Shade, wind and rock change this on the day. Not a forecast.
Ichiukyo is a canyon in Japan. The relief model measures 819 m from the floor to the lower rim. Rim to rim it is 5.2 km wide where the cut was taken.
Getting there.
- Sadamitsunearest town · 10 km in a straight line
- Viewpointsnearest viewpoint · 1.8 km from the floor
- Takamatsu Airport (TAK)nearest airport with scheduled flights · 31 km in a straight lineCar hire at KCZ airport (Nankoku)Discover Cars · sponsored link↗
- From April to May and in Octoberbest months to hike (estimate)
Plan the visit
Guided hikes, a bed nearby, a car.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
From the sky.
The canyon from above, with the relief shaded, the line of the cut, the river and what people have mapped around it.
N
3 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 12 × 12 km, north up. The line is the cut above. Points © OpenStreetMap contributors.
Around the canyon.
- 1viewpoints within 5 km
- 3footbridges and suspension bridges within 3 km
- 1named waterfalls within 4 km土釜
- 10hotels and guesthouses within 8 kmいやしの温泉郷, 中尾山高原平成荘, 剣神社簡易宿泊所 and 7 more
- marked hiking routes within 4 km
- via ferrata routes within 4 km
- climbing crags within 3 km
- rafting, canoe, kayak or canyoning spots within 4 km
- swimming spots within 3 km
- caves within 3 km
- car parks within 3 km
- information boards and visitor centres within 4 km
- bus stops within 2 km
- campsites within 8 km
- restaurants and cafés within 4 km
Counted in OpenStreetMap, the map anyone can edit, around the floor of the canyon. A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
Towns nearby
- Sadamitsu10 km in a straight line
- Mima15 km in a straight line
- Wakimachi16 km in a straight line
- Hara17 km in a straight line
- Miyoshi19 km in a straight line
- Yoshinogawa24 km in a straight line
In our other atlases
What else is around Ichiukyo.
The river that carved it, the waterfalls inside it, the mountains on the rim, the lakes, beaches and island nearby — from our six sister atlases, each with its own figures.
Cascadyas1 waterfalls nearbyComing soon
Peakyas24 mountains within 15 kmFigures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, NOAA, OpenStreetMap). Links open when each site is online.
Month by month
The weather, at the floor and at the rim.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon · floor | 7 | 9 | 13 | 18 | 23 | 26 | 30 | 31 | 27 | 21 | 16 | 10 |
| Afternoon · rim | 2 | 4 | 8 | 13 | 18 | 21 | 25 | 25 | 21 | 16 | 10 | 4 |
| Night · rim | -6 | -6 | -3 | 2 | 7 | 12 | 16 | 17 | 13 | 7 | 1 | -4 |
| Rain (mm) | 60 | 84 | 112 | 125 | 164 | 233 | 243 | 204 | 238 | 188 | 88 | 76 |
| Rainy days | 7 | 8 | 11 | 11 | 12 | 16 | 15 | 15 | 15 | 11 | 8 | 7 |
| Sun hours/day | 4.4 | 4.7 | 5.7 | 6.4 | 6.6 | 5.2 | 5.8 | 7.2 | 5.4 | 5.1 | 4.5 | 4.2 |
| Snow on the ground (cm) | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Afternoon · floor | Afternoon · rim | Night · rim | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | 7 | 2 | -6 | 60 | 4.4 |
| Feb | 9 | 4 | -6 | 84 | 4.7 |
| Mar | 13 | 8 | -3 | 112 | 5.7 |
| Apr | 18 | 13 | 2 | 125 | 6.4 |
| May | 23 | 18 | 7 | 164 | 6.6 |
| Jun | 26 | 21 | 12 | 233 | 5.2 |
| Jul | 30 | 25 | 16 | 243 | 5.8 |
| Aug | 31 | 25 | 17 | 204 | 7.2 |
| Sep | 27 | 21 | 13 | 238 | 5.4 |
| Oct | 21 | 16 | 7 | 188 | 5.1 |
| Nov | 16 | 10 | 1 | 88 | 4.5 |
| Dec | 10 | 4 | -4 | 76 | 4.2 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the floor (238 m) and the rim (1,088 m) with the standard lapse rate. Not a forecast.
Photographs
Seen from the trail.
Recent years
Wet years, dry years.
Rain of each month as a share of the 1991–2020 average. A dry year means a lower river and hotter rock; a wet one, more water in the gorge.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 172% | 79% | 98% | 111% | 77% | 95% | 186% | 9% | 112% | 157% | 74% | 33% |
| 2021 | 163% | 70% | 134% | 117% | 146% | 58% | 80% | 228% | 103% | 39% | 129% | 88% |
| 2022 | 46% | 41% | 104% | 100% | 99% | 54% | 80% | 42% | 107% | 48% | 118% | 46% |
| 2023 | 77% | 38% | 90% | 180% | 208% | 209% | 46% | 184% | 63% | 38% | 134% | 43% |
| 2024 | 53% | 152% | 159% | 135% | 163% | 135% | 70% | 108% | 66% | 101% | 175% | 8% |
| 2025 | 52% | 35% | 98% | 88% | 211% | 111% | 94% | 54% | 99% | 108% | 64% | 88% |
130% or more: wet month 70% or less: dry month
Compare with the neighbours.
Ichiukyo
Japan
- 819 mDepth
- 5.2 kmRim to rim
- —Length
- 37°Steepest wall
Where these figures come from
| Name, type, published depth and length | Wikidata (Q11352519) · CC0 |
|---|---|
| The cut: depth, width, wall and 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 |
| Viewpoints, trails, bridges and the river line | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Rivers, waterfalls, mountains, lakes, beaches and islands nearby | Coastya, Lakeyas, Peakyas, Cascadyas, Islandyas, Riveryas |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
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