Samurai Crusader Vol 1

From the VIZ Media edition

The story follows Kumomaru, a Japanese samurai who travels to Europe in during the 1930s and becomes embroiled in a plot to steal the legendary Japanese sword Kusanagi. While in Europe, Kumomaru befriends Ernest Hemingway and Pablo Picasso and attempts to stop Major General Kamishima and his Nazi allies from conquering China.

Source: Anime News Network Encyclopedia