Freestone · Volcanic · Kyūshū

Gokase River (Takachiho)

Gokase River (Takachiho) terrain map
Terrain map

The Gokase rises in the volcanic highlands of Miyazaki and runs through the mythic gorge of Takachiho — basalt-columned, waterfall-hung, woven into the oldest Japanese legends — holding yamame and iwana in its cooler upper water.

Species

Slow going — pick your moments

Low and clear — careful approach country. Cover and shadow are doing the work today.

Running clear, the water's warmed to around 18°C, sitting at a steady height.

80% confidence in this read
Water temperature for yamame
Warm — slow
18°C est.ideal 9–16°C
0°14°28°
The full read · show the working · for yamame · confidence 80%
How the 30 is built — score × weight = contribution
Temperature60 × 28%16.8
Flow45 × 22%9.9
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Conditions total= 65
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
What would change the calculation
Cooler water — back toward the 9–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Conditions
○Regional est.
Level
Dry recently
No gauge reading
Water temp
17.6°C
Estimated
Clarity
Clear
Air temp
18°C
Wind
NW 7 km/h
Light breeze
Pressure
1016 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
6.6 mm
Light rain · next 48h

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

Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour with Pro.

Start free trial

14-day free trial. Cancel anytime.

How to fish it · for yamame
When
Spring to the autumn closure; cooler upper reaches in high summer
Where
The Gokase rises in the volcanic highlands of Miyazaki and runs through the mythic gorge of Takachiho — basalt-columned, waterfall-hung, woven into the oldest…
Why this works
⚠️ Water at 17.6°C — above the masu salmon caution line (17°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Stenopsyche CaddisHatch
2
3
3
2
Cicada (Semi)Hatch
2
2
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2

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

Permits & access
Permit required — see local rules.
  • Co-operative yugyoken required; spawning closure in autumn
  • Southern waters warm early — fish higher and cooler in summer.
Directions
Apple MapsGoogle Maps
About this water

The Gokase rises in the volcanic highlands of Miyazaki and runs through the mythic gorge of Takachiho — basalt-columned, waterfall-hung, woven into the oldest Japanese legends — holding yamame and iwana in its cooler upper water. The southern edge of Japanese salmonid country, fishing in a landscape of myth and volcanic rock.

Under the surface

A river of the Miyazaki volcanic highlands, threading the legendary basalt gorge of Takachiho with its columned cliffs and waterfalls. Yamame and iwana hold in the cooler upper reaches — the southern frontier of Japanese mountain-stream fishing, in a place of deep myth.

Wading: Warm edge southern water, slick basalt

  • River
  • Volcanic
  • Confined
  • Pool riffle
  • Pocket water
Seasons & zones
  • Charlate February to April → late September to mid-October
Water here around 18°C. Nothing cooler within range — carry a thermometer.
Related guides