Nagoya government officials said Thursday that around 100,000 dead fish had been found in a canal between May 3 and May 6.
The Nagoya Port Association said dead gizzard shad and gobies were found in an 8-kilometer-long stretch of canal between Nakagawa and Minato wards, Fuji TV reported.
A similar incident occurred two years ago, killing 230,000 fish.
Experts suggested one reason the fish may have died is because sludge at the bottom of the canal depleted the amount of oxygen in the water.
Residents complained Thursday about the smell of dead fish. The cleanup is expected to take another day.
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