Lowland · Peat · Hokkaido, JP

Sarufutsu River

Sarufutsu River venue image
Tomorrow · A side-water session, not the main event
Intruder-profile fly
Forecast · Tomorrow
A side-water session, not the main event
A patient day. Fish the cover and stay with it.
72% projected
Today's fly
Intruder-profile fly
Intruder-profile fly
Conditions on the water · Tomorrow
Estimate
Level
Dry recently
No gauge reading
Water temp5.4°C
ClarityVery coloured
Weather5°C
WindN 10 km/h
Pressure1000 hPa
Rain · recent0.4 mm
Rain · ahead9.0 mm

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

Water temperature for Itou (Sakhalin Taimen)
Cool — slow
5°C est.ideal 6–14°C
0°14°28°
How to fish it · for Itou (Sakhalin Taimen)
When
Late spring and autumn, subject to conservation rules
Where
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:…
Why this works
Excellent conditions for huchen. Baitfish present across pool heads and slower runs — cover both systematically.
Hatch timeline · tomorrowQuiet day

Low insect activity predicted today

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Ephemera orientalis (Lowland Mayfly)Hatch
2
3
3
3
2
Cicada (Semi)Hatch
2
2
Stenopsyche CaddisHatch
2
3
3
2
Ugui / Japanese DaceHatch
2
3
3
3
3
3
3
3
3
3
3
2

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

Ranked for today
Fly box · Itou (Sakhalin Taimen)
LB
Large baitfish streamerTop
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
MS
Mouse / surface-wake fly
12–16 · Fly
A dependable searching pattern for these waters.
LS
Leech streamer
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
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.
What's coming
Plan ahead
5-day outlook
Gallery · 1
  1. Terrain map of the venue
    Terrain map
Conservation note

Sakhalin taimen / Itou (Parahucho perryi) — a conservation-sensitive northern Hokkaido population, taxonomically distinct from European huchen (Hucho hucho) and Siberian taimen (Hucho taimen); do NOT route through the European hucho scoring path. Catch-and-release and habitat protection dominate. Amemasu also present. Prose only.

Directions
Apple MapsGoogle Maps
Seasons & zones
  • Taimen late spring → autumn

    Sakhalin taimen (Itou) — conservation-first, catch-and-release only. Species surfaced in prose; not scored. Legal status: guidance_not_permission.

Related guides
Euro Nymphingsubsurface methods
Booking & contacts