known in Japan as the Spy Ship Incident in the Southwest Sea of Kyūshū (九州南西海域工作船事件, kyūshū-nansei-kaiiki-kōsakusen-jiken), was a six-hour naval confrontation...

Shogakukan, 2000 ISBN 409404471X "不審船事案について". Archived from the original on 2006-09-04. Retrieved 2020-10-30. "九州南西海域における工作船事件について" [Incident of a spy vessel...