Tsurizukan

Fish

Amur Catfish ナマズ

Silurus asotus ・ ナマズ科

Amur Catfish (Silurus asotus)
Photo: rhosoi / CC BY 2.0 — source

Catch season

Months for Amur Catfish are a broad Japan-wide guide and shift with region, temperature and conditions; prefer local reports and rules.

About

A big-mouthed, scaleless fish sheathed in slime, growing past 70 cm. Adults carry four barbels, one pair on each jaw; fry start with six and lose a pair as they grow. It hunts small fish and frogs by night in slow lowland rivers and ponds. Japanese folklore has long credited it with sensing earthquakes before they strike.

Basics

Scientific name
Silurus asotus
Family
ナマズ科
Japanese name
ナマズ
Kana
なまず
Waters
Rivers & lakes
Size
39 cm (max 70 cm)
Time of day
Dawn, Dusk, Night
Depth (tana)
Around bank cover and through mid-water, changing depth with season and temperature.

How to catch it

A night feeder, taken on topwater lures retrieved slowly across rivers and irrigation canals. It pushes into the shallows to spawn from late April through June.

Freshwater lure fishing from a Lake / Pond / Reservoir

Amur Catfish: Retrieve parallel to banks and inflows, changing depth and speed if there is no response. Follow local invasive-fish handling rules.

Waters: Rivers & lakes

Kit for this fish

Freshwater lure starter kit ・ Kit total ¥17,000–50,000

First check the permit, lure and hook rules, and handling requirements for invasive fish.

Product links may be affiliate links. Prices move, so treat the ranges as a guide.

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Handle with care

This fish is dangerous to handle bare-handed.

Sharp spines Moderate ・ Where: 胸びれ・背びれの棘

Hard fin spines can puncture skin; do not grip the fish in a bare hand. Reliable primary evidence of venom was not confirmed, so this guide does not label the spines venomous.

Dangerous fish and animals — what to do when you are stung or bitten

Eating

Eating quality 2/5 ★★☆☆☆

Food use varies locally. Check harvest rules and water quality, avoid raw consumption and cook thoroughly.

Rules

Inland rules are water-specific. Check the fishery cooperative and prefecture for day or annual permits, closed seasons, minimum sizes, tackle, harvest and release rules.

Closed seasons and size limits — how to find the numbers, which differ by prefecture

This article organises general information and is not legal advice. Rules differ by municipality and by fishery cooperative, and they change. Always check the current rules for where you are going.

Other fish taken the same way

Other fish from the same kind of place

Seasons, sizes and eating quality are general guides. Rules change, so check the latest prefectural, fishery-cooperative and site rules before fishing. This app provides general information, not legal advice.