Long ago; a man with massive testicles reportedly made a living as a sideshow attraction at Mount Satta; on the old Tokaido Road near the city of Shizuoka. His scrotum is said to have measured about a metre across.

The Kaikidan Ekotoba is a mid-19th century handscroll that profiles 33 legendary monsters and human oddities; mostly from the Kyushu region of Japan; but with several from other countries; including China; Russia and Korea. The document; whose author is unknown; is in the possession of the Fukuoka City Museum.