Fishing Spot Japan

Rainbow Trout fishing in Lake Kawaguchi

April, May, October and November are the prime months. A cooperative day permit is required.

When

J
F
M
A
M
J
J
A
S
O
N
D

Season grading is our editorial judgement, not a sourced figure. It says when the fish is catchable, not when the water is legally open — for that, read the closed seasons below.

Do you need a permit?

A cooperative day permit is required. Typically ¥1,000–2,000. Day permit required. Renting a boat unguided requires a Japanese boating licence.

Water
Freshwater
Prefecture
Yamanashi
Region
Chubu
Getting there
1 h 50 from Shinjuku

How far our answer goes here

  • ✓National lawApplies everywhere. Foreign-national gear limits, protected species, bluefin controls.
  • ?PrefectureMinimum sizes, closed seasons and legal gear. This is a floor — local rules add to it, never subtract.
  • ~Sea-area / inland committeeDirectives that close specific waters or periods. We hold these for a few prefectures only.
  • ✓Cooperative permitKawaguchiko Fishery Cooperative
    Its permit rules took effect 1 January 2024. Night fishing is prohibited on Lake Kawaguchi and wardens patrol. A separate local fishing tax applies on top of the permit.

Rules stack. Everything above the line we hold; everything below it you still need to confirm on the ground. That gap is exactly what a local guide is for.

Size limits and closed seasons

Not yet transcribed for this prefecture. The cooperative’s permit rules and national law still apply.

About Rainbow Trout

Widely stocked in lakes and managed river sections.

Japanese
· nijimasu
Scientific name
Oncorhynchus mykiss
Typical size
25–60 cm (10–24 in)

How it is fished here

Lure casting, Fly fishing

Elsewhere

Rainbow Trout is also listed at Lake Akan, Niseko mountain streams, Lake Chuzenji, Lake Ashi. Everything caught in Lake Kawaguchi.