Mashin Eiyuuden Wataru: Owarinaki Toki no Monogatari
Japanese title: 魔神英雄伝ワタル　終わりなき時の物語
Alternative titles: Mashin Eiyuuden Wataru: The Never-Ending Tale of Time
Type: OVA
Source: Original
Episodes: 3
Status: Finished Airing
Aired: Oct 1, 1993 to Feb 1, 1994
Duration: 28 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Sunrise
Genres: Fantasy

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)