In September the ship's captain, "who was in an exclusive economic zone of the Russian Federation, caught some 200 kilograms of Pacific saury without authorization, which was later packed in 20 cardboard boxes," prosecutors said.
"During the pursuit of the ship by a Russian border guard vessel, all twenty boxes were thrown overboard," the statement said.
Prosecutors said the captain of the No.9 Eun Hae ship had paid damages of 45,360 rubles ($1,686).
Russian authorities have been involved in several disputes in recent years over fishing rights in its Far East waters.
In August, the captain of a Japanese vessel was arrested near the Kuril Islands off Russia's Pacific coast in an incident in which one of his crewmates was fatally shot by Russian border guards. Russian officials said the vessel was suspected of illegally fishing for valuable crab in Russian waters, and that border guards had fired warning shots only after it had refused to stop.
