Mountain Freestone · Granite · Honshū

Kurobe River (upper gorge)

Jujikyo in Kurobe Gorge

Yasu - CC BY-SA 3.0

The Kurobe cuts one of the deepest gorges in Japan through the granite of the Northern Alps, a river of dam, tunnel and sheer rock where iwana live in cold pockets at the foot of immense walls.

Species

About as good as it gets

River dropping into shape after a lift. The kind of afternoon you tell people about later.

The water temperature should be close to 13°C, about where the char want it, the river's easing back into shape after a lift, and starting to clear.

75% confidence in this read
Water temperature for white-spotted char
Ideal
13°C est.ideal 714°C
0°14°28°
The full read · show the working · for white-spotted char · confidence 75%
How the 81 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow90 × 22%19.8
Clarity75 × 18%13.5
Feeding Time70 × 13%9.1
Pressure75 × 7%5.3
Insect activity42 × 12%5.0
Conditions total= 81
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Conditions
Regional est.
Level
Moderate rain recently
No gauge reading
Water temp
12.8°C
Estimated
Clarity
Clearing
Air temp
12°C
Wind
S 4 km/h
Calm
Pressure
1021 hPa
Rain · 48h
14.9 mm
Moderate rain
Rain · ahead
8.9 mm
Light rain · next 48h

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 10 active hatches hour by hour with Pro.

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

How to fish it · for white-spotted char
When
Summer, when the high country is open and snow has cleared
Where
The Kurobe cuts one of the deepest gorges in Japan through the granite of the Northern Alps, a river of dam, tunnel and sheer rock where iwana live in cold…
Why this works
Excellent — water temperature is working for you, but insect activity is the limiting factor today.
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Gallery · 2
  1. Jujikyo in Kurobe Gorge
    V-shaped gorge in Toyama.
  2. Terrain map of the venue
    Terrain map
Permits & access
Permit required — see local rules.
  • Area rules and serious access constraints; confirm permits and route
  • Mountain safety is essential.
Directions
About this water

The Kurobe cuts one of the deepest gorges in Japan through the granite of the Northern Alps, a river of dam, tunnel and sheer rock where iwana live in cold pockets at the foot of immense walls. Hard, dramatic, half-wilderness water reached by mountain railway and trail, fished by those who go deep into the range.

Under the surface

A river in one of Japan's deepest granite gorges, in the heart of the Northern Alps, between sheer walls and the famous Kurobe dam. Iwana hold in cold pockets beneath the cliffs; access is by mountain railway, tunnel and trail. Spare, dramatic, half-wilderness keiryu.

Wading: Deep gorge, sheer walls, cold swift water, serious access

  • River
  • Granite
  • Confined
  • Pocket water
  • Step pool
Seasons & zones
  • Charlate February to April → late September to mid-October
Other water nearby · 1
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