Mountain Freestone · Granite · Honshū

Kurobe River (upper gorge)

Jujikyo in Kurobe Gorge
Good · White-spotted Char
Tenkara kebari · 12–16
Goodlive now
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
90% confidence
What moved it
  • LevelLight rain recentlyNo gauge reading
  • Water temp15.1°C
  • ClarityClear
Today's fly
TK
Tenkara kebari12–16
A dependable searching pattern for these waters.
Conditions on the water
Estimate
Level
Light rain recently
No gauge reading
Water temp15.1°C
ClarityClear
Weather12°C
WindSE 8 km/h
Pressure1010 hPa
Rain · recent8.9 mm
Rain · ahead27.3 mm

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

Water temperature for White-spotted Char
Warm — slow
15°C est.ideal 7–14°C
0°14°28°
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
Good — water clarity is right today, though river flow could be better.
Hatch timeline · todayPeak at 6pm

Hatch predictions

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Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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Evidence
ModelledModerate confidence

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

Updated 5 hours ago

Through the year
0–3 scale · August 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.

Ranked for today
White-spotted Char fly box
CM
Clinger mayfly dun (Epeorus / Rhithrogena)
14–18 · Dry
Cast to rising fish and let it drift drag-free.
Permits & access
Permit required — see local rules.
  • Area rules and serious access constraints; confirm permits and route
  • Mountain safety is essential.
What's coming
Plan ahead
5-day outlook
Other water nearby · 1
Azusa River (Kamikōchi)
33 km
67
White spotted char · Yamame · Rainbow trout
Gallery · 2
  1. Jujikyo in Kurobe Gorge
    V-shaped gorge in Toyama.
  2. Terrain map of the venue
    Terrain map
Conservation note

White-spotted char (iwana).

The full read · show the working · for White-spotted Char · confidence 90%
How the 74 is built — score × weight = contribution
Temperature71 × 28%19.9
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure75 × 7%5.3
Insect activity68 × 12%8.2
Conditions total= 74
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Char late February to April → late September to mid-October

    Honshu/Shikoku/Kyushu keiryu are managed by local fishery co-operatives — a yugyoken (day/annual ticket) is required, and most streams close around 30 September / mid-October for spawning. Species are surfaced in prose only (no engine slugs for yamame, amago or iwana). Legal status: guidance_not_permission.

Related guides
Euro Nymphingsubsurface methods
Booking & contacts