A modern day elementary schooler gets sent back in time where he meets Aterui - a leader of the Ainu (indigenous Japanese) who fight against the Imperial Court.
Source: MAL
Nakajima Yuuki
Related works
* Based on the real life events around Yevfimy Vasilyevich Putyatin, a Russian admiral noted for his diplomatic missions to Japan and China, his voyage to Japan, 1854 Ansei-Toukai earthquake, and the signing of the Treaty of Shimoda in 1855.
Note: Spasibo (спасибо) - "thank you" in Russian.