Stillwater · Volcanic · Hokkaido, JP

Lake Akan

Lake Akan fishing venue photo

Lake Akan sits in a caldera of the eastern Hokkaido highlands, a cold volcanic lake ringed by spruce and steam, where the Ainu have lived alongside the water for centuries and the green marimo grow on its floor.

Fair · White Spotted Char
Chironomid pupa / buzzer · 10–14
A side-water session, not the main event
Good wave on — drift country. A useful wave. Work the productive shore.
49% confidence
limited data

Lake Akan is often best in spring through autumn.

What moved it
  • WindSE 7 km/hLight breeze
Today's fly
Chironomid pupa / buzzer
Chironomid pupa / buzzer10–14
Static or slow on a long leader — the staple stillwater chironomid.
Conditions on the water
Estimate
Wind
Light breeze
SE 7 km/h
N
SE
from the south-east
WaveRipple
Water temp12.7°C
Air temp14°C
CloudOvercast
Pressure1016 hPa
Rain · recent0.0 mm

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

How to fish it · for White Spotted Char
When
Mid-May to late June and mid-October to late November
Where
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
The plan
Plan A

Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.

Plan B

If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.

Watch for

Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.

Boat — drift

A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Claret DunHatch
2
3
2
Heather FlyHatch
2
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
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
Chironomid pupa / buzzer
Chironomid pupa / buzzerTop
10–14 · Buzzer
Static or slow on a long leader — the staple stillwater chironomid.
SF
Smelt-fry baitfish streamer
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
Permits & access
Permit required — see local rules.
  • Local recreational charge and current Lake Akan rules apply; check zones, boat rules and any C&R requirement.
What's coming
Plan ahead
5-day outlook
Condition match
85%
Cloud50%
Wind100%
Temp100%

Conditions are ideal for Lake Akan — wind, cloud and temperature all line up.

Other water nearby · 1
Lake Kussharo
24 km
White spotted char · Rainbow trout
Gallery · 3
  1. An amemasu (white-spotted char) from Lake Akan
    An amemasu (white-spotted char) from Lake Akan
  2. Lake Akan Kushiro Hokkaido Japan01s3
    Caldera lake in volcanic Akan-Mashū National Park.
  3. Terrain map of the venue
    Terrain map
About this water

Lake Akan sits in a caldera of the eastern Hokkaido highlands, a cold volcanic lake ringed by spruce and steam, where the Ainu have lived alongside the water for centuries and the green marimo grow on its floor. For the fly angler it is amemasu — the white-spotted char — with rainbow trout and the landlocked kokanee, fished in the clear cold windows of spring and autumn.

Under the surface

A caldera lake in the volcanic country of Akan-Mashū, cold and clear under the spruce, hot springs steaming at its margins and an Ainu kotan on its shore. The fishing is a spring-and-autumn affair; high summer sends the fish deep and the lake falls quiet.

Wading: Cold deep lake, sudden mountain weather — boat/shore

  • Lake
  • Volcanic
  • Stillwater
  • Shoal
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Temperature (cool) is in the sweet spot for autumn fishing.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Char spring → late autumn

    Hokkaido is largely open-access for inland trout/char, with managed/charged zones the exception (e.g. the Akan C&R water). Verify the exact reach. Species surfaced in prose only. Legal status: guidance_not_permission.

Related guides
Thermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Booking & contacts