NHK Enterprises 21

A short film introduces Semira, a strange boy who comes to play with Ojaru and his chums and bears a marked resemblance to a boy of the same name who spent a summer with the village elders when they were boys, long ago. Source: AnimeVice

* 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.