Check which species have trophy potential in Japan Slough
Japan Slough fishing reports
length · weight
length · weight
length · weight
length · weight
length · weight
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When are Largemouth Bass biting on Japan Slough?
Learn what time of year and day to go fishing at Japan Slough. Download Fishbrain today to look for new fishing spots, scout new fishing access, or prep for your next trip.
Fishing regulations at Japan Slough, IA
Disclaimer: Always check local fishing regulations, water access rights and land ownership before fishing, regardless of any catches logged in that area by the Fishbrain community. Fishbrain has mapped millions of acres of government-owned land across the USA to help you identify potential fishing access, but you are responsible for ensuring compliance with all legal requirements.
Fishing regulations in Iowa can change throughout the year. Make sure to check this page before fishing for the most up to date rules and regulations for the current season. Local regulations govern when you can fish, the max size of the fish you can keep, how many fish you can keep, and more.
Below you will see fishing regulations for catching Largemouth bass as of April 2nd, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.
Seasons
Bag limit
Min size
Measurement
Special gear
Aggregate
Micropterus nigricans
Regulations for
FAQ about Japan Slough fishing
- Largemouth bass - 1 members reported to have caught this fish
- Walleye - 1 members reported to have caught this fish
- @CrappieKiller1220 reported a nice Largemouth bass.
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