The story is about a 9-year-old boy named Wataru Ikusabe who is magically transported to a magical realm of the gods called Sokaizan which he is supposed to save. He also befriends many of the Soukaizan natives, and forms some very strong friendship bonds. (Source: Wikipedia)
Genres: Fantasy
Watch Mashin Hero Wataru: A Story At An Endless Time episode 1 online — subbed and dubbed, with automatic AniList / MyAnimeList progress sync.