The Japanese Olympic Committee has penalized four players on the men's Asian Games basketball team for buying sex in Jakarta and sent them back home, a senior official said Monday.

Japanese delegation chief Yasuhiro Yamashita, speaking at a news conference in the Indonesian capital, said the players were stripped Sunday of their membership of the national team as their conduct violated the committee's rules.

The B. League players — Yuya Nagayoshi, 27, Takuya Hashimoto, 23, Takuma Sato, 23, and Keita Imamura, 22 — left Jakarta early Monday morning to return to Japan, according Yamashita, who led a record-high 762-athlete delegation to the Asian Games, the world's biggest multisport event after the Olympics.