This episode explores a mysterious event from 1803 Japan, where fishermen discovered a strange, round vessel—called the Utsuro-Bune—washed ashore with a foreign-looking woman inside. She spoke no Japanese, carried a guarded box, and soon vanished after locals sent her back to sea. Multiple historical documents from the Edo period recorded the incident, fueling centuries of debate. Was it early foreign contact, symbolic folklore, or even a proto-UFO encounter? Though the truth remains elusive, the story of the Utsuro-Bune lives on as one of Japan’s most fascinating and enduring unsolved mysteries.