Spate · Granite · Honshū

Miomote River

Miomotegawa river

河川一等兵 - CC BY 3.0

The Miomote falls out of the snow country of northern Niigata, a powerful river famed for the sea-run cherry salmon — sakuramasu — that climb it in spring, and for resident yamame and iwana above.

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 28 is built — score × weight = contribution
Temperature55 × 28%15.4
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time25 × 13%3.3
Pressure80 × 7%5.6
Insect activity52 × 12%6.2
Conditions total= 61
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
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
17.8°C
Estimated
Clarity
Clear
Air temp
17°C
Wind
SE 6 km/h
Light breeze
Pressure
1018 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
5.0 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 8 active hatches hour by hour with Pro.

Start free trial

14-day free trial. Cancel anytime.

Evidence
ModelledModerate confidence

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

How to fish it · for yamame
When
Late spring after the thaw, into autumn
Where
The Miomote falls out of the snow country of northern Niigata, a powerful river famed for the sea-run cherry salmon — sakuramasu — that climb it in spring,…
Why this works
⚠️ Water at 17.8°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
Cicada (Semi)Hatch
2
2
Stenopsyche CaddisHatch
2
3
3
2
March BrownHatch
2
3
2
GrannomHatch
2
2

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

Gallery · 2
  1. Miomotegawa river
    River in Niigata Prefecture.
  2. Terrain map of the venue
    Terrain map
Permits & access
Permit required — see local rules.
  • Co-operative yugyoken required; sakuramasu are often specially regulated or restricted — verify before targeting
  • Spawning closure in autumn.
Directions
Apple MapsGoogle Maps
About this water

The Miomote falls out of the snow country of northern Niigata, a powerful river famed for the sea-run cherry salmon — sakuramasu — that climb it in spring, and for resident yamame and iwana above. Big snowmelt water, heavy in the thaw and clearing into summer, with a strong fishing culture in the valley towns below.

Under the surface

A strong snow-country river off the northern Niigata mountains, running heavy with the spring thaw and clearing through summer. Sea-run sakuramasu ascend in spring; yamame and iwana hold in the resident water above. Big, serious keiryu in deep-snow country.

Wading: Heavy snowmelt flows, powerful water

  • River
  • Granite
  • Partly confined
  • Pool riffle
  • Large river
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