Ginkgo biloba (milk ginkgo) in bitter bamboo, Ginkgo-cho, Sendai City A huge ginkgo tree that has been designated as a national natural monument. The tree is estimated to be 1,200 years old, over 30 meters tall, and approximately 8 meters in circumference. This tree is so named because it has many aerial roots, a type of root, that hang down from its trunk, resembling breasts, and is also the origin of the name ``Ginkgo Town.''