Hoero! Tekken

Joji learns a dark secret from his dying father; he learns he has a twin brother and a sister. He travels to find his brother and finds he has been murdered in mysterious circumstances. While staying with his sister, he overhears his uncle's plans to find a 130CT diamond (named the Queen of Sheba) and soon learns that the uncle may be behind other sinister schemes.
(Source: IMDB)