Minamoto no Sanetomo
The tree was nicknamed "kakure-ichō" (hiding ginkgo), derived from an Edo period legend in which Minamoto no Sanetomo is assassinated on 13 February 1219 by his nephew, Kugyō, who had been hiding behind the tree.　In fact ginkgos arrived from China in the 14th century, and a 1990 tree-ring measurement indicated the tree's age to be about 500 years.