Gensoumaden Saiyuuki: Kibou no Zaika
English name: Saiyuki Interactive
Genres: Adventure, Fantasy
Type: OVA, Episodes: 1
Aired: Sep 19, 2002
Studio: Pierrot
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
A mysterious light falls from the Heavens. It's the Pearl Jade. It can grant any wish. Dr. Ni tells Gyokumen Koushu about it. Lirin overhears and tells Kougaiji. Then Kanzeon Bosatsu (The Merciful Goddess) requests "orders" Sanzo and company to go and find and seal it before it falls into the wrong hands. 

(Source: ANN)