Lowland · Peat · Hokkaido

Sarufutsu River

Sarufutsu River venue image
Google Places

The Sarufutsu moves slowly through the peat wetlands of Japan's far north, dark and unhurried, and it is first a conservation icon and only second a fishery: the most important river left to the Sakhalin taimen, a great northern fish vanished from most of its range.

Species

About as good as it gets

Low and clear — careful approach country. Take your time — read the water before you cast.

The water's warmed to around 17°C, sitting at a steady height, running clear.

90% confidence in this read
Water temperature for brown trout
Warm — slow
17°C est.ideal 10–16°C
0°14°28°
The full read · show the working · for brown trout · confidence 90%
How the 81 is built — score × weight = contribution
Temperature83 × 28%23.2
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time75 × 13%9.8
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
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
Dry recently
No gauge reading
Water temp
16.7°C
Estimated
Clarity
Clear
Air temp
18°C
Wind
SW 15 km/h
Gentle breeze
Pressure
1010 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
4.0 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 12 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 brown trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Excellent — water clarity is right today, though insect activity could be better.
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
Terrestrial BeetlesHatch
2
3
3
2
Blue Winged OliveHatch
1
2
2
2
2
1

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

Gallery · 1
  1. Terrain map of the venue
    Terrain map
Permits & access
Permit required — see local rules.
  • Conservation-first water
  • Verify current local rules, land access and closures; barbless hooks, keep fish wet, guide strongly recommended
  • No catch-rate promises.
Directions
Apple MapsGoogle Maps
About this water

The Sarufutsu moves slowly through the peat wetlands of Japan's far north, dark and unhurried, and it is first a conservation icon and only second a fishery: the most important river left to the Sakhalin taimen, a great northern fish vanished from most of its range. The right way to know it is quietly — guide-led, catch-and-release, mindful of the spawning gravels and the fragile wetland.

Under the surface

A slow, tea-dark river winding through northern Hokkaido peat wetland toward the Okhotsk coast, sea-run Sakhalin taimen moving up its coloured lower reaches. A fragile, conservation-first place; the fishing is incidental to the protection of one of the last strongholds of a vanishing fish.

Wading: Soft wetland margins, remote far north access — guide led

  • River
  • Peat
  • Unconfined
  • Meandering
  • Lowland
Seasons & zones
  • Taimenlate spring → autumn
Related guides