Fish
Anguilla japonica ・ Anguillidae (Freshwater Eels)
Activity rises in rivers and estuaries from early summer into autumn, especially after rain.
Its lower jaw juts out past the upper one, and it lacks the row of white spots that marks the conger — two quick ways to tell the two apart. The slimy skin conceals tiny scales embedded beneath it. After five to twelve years in fresh water it migrates to the sea west of the Mariana Islands to spawn, where wild eggs were finally collected in 2009.
Nocturnal, so it is fished on summer nights in the lower reaches of rivers and in estuaries with a simple bottom rig baited with earthworms. Work the foot of embankments and around snags. Some rivers impose size limits or closed seasons for conservation.
After rain, place bait beside rocks where the current eases at dusk. Do not tear out a swallowed hook, and always check resource-management and local rules.
Waters: Rivers & lakes, Southern Pacific coast, Seto Inland Sea
Chonage starter kit ・ Kit total ¥11,000–24,000
A compact rod travels by train. Jarime is the easiest bait to handle.
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This fish is dangerous to handle bare-handed.
Serum toxin
Japan's Ministry of Health states that eel serum contains a protein toxin that can inflame eyes, the mouth, or wounds. Do not eat eel raw or let fresh blood contact mucosa or cuts; normal thorough cooking inactivates the toxin.
Killing and carrying your catch — the taste is decided at the pier, not the kitchen
Traditionally grilled with or without sauce. Never eat eel raw; cook it thoroughly.
Best eating: June–September
Japanese eel is managed as a depleted resource; closed seasons, minimum sizes and recreational rules vary locally. Always check current 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.
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.