The Japan Coast Guard has arrested the captain of a South Korean fishing boat that ignored an order to stop for inspection in Japan's exclusive economic zone, the coast guard said Sunday.

Im Chae-moon, 57, was arrested at around 6:10 p.m. Saturday in waters off Nagasaki prefecture. The boat was stopped by a Japanese patrol vessel, and five other South Koreans and two Indonesians were found aboard.

The captain was released Sunday after admitting to the charges against him, with the South Korean Embassy in Tokyo agreeing to post bond of ¥500,000.

Meanwhile, a sailboat flying a Chinese flag and three Chinese coast guard vessels loitered in Japanese waters near the disputed Senkaku Islands in the East China Sea for about 5½ hours on Saturday evening.

The Japan Coast Guard saw crew of the boat throwing 10 reddish buoys into the sea.

The Chinese boat ignored an order to leave and the purpose of its presence remains unknown.