虚舟 うつろぶね Also written うつろ舟, 空舟 Meanings Noun utsuro-bune; hollow ship (i.e.: unidentified craft said to have washed ashore in Ibaraki Prefecture in 1803, sometimes alleged to have been a UFO) Kanji 虚 void 舟 boat. Read as ふね. Jinuma: Japanese Dictionary · Word lists