Yokosuka Naval Arsenal became the first modern arsenal to be created in Japan .
The Kanrin Maru sailed from Yokosuka in 1860 with the first Japanese diplomatic embassy to the United States in 1860 .
Yokosuka Naval Arsenal became the first modern arsenal to be created in Japanese .
The Kanrin Maru sailed from Yokosuka in 1860 with the first Japanese diplomatic embassy to the United States in 1860 .