最遊記歌劇伝
http://translate.google.com/translate?hl=en&sl=ja&u=http://www.animate.co.jp/saiyuki/&ei=lRyOSamBFpzgM_XP2ZQL&sa=X&oi=translate&resnum=4&ct=result&prev=/search%3Fq%3D%25E6%259C%2580%25E9%2581%258A%25E8%25A8%2598%25E6%25AD%258C%25E5%258A%2587%25E4%25BC%259D%26hl%3Den%26sa%3DG Well! The great big ugly link above is to the english "translation" of the Animate page with details on the Saiyuki musical. There's even a link for placing a mail order, which I haven't clicked on yet to see how hard it would be.
But!!! There's a video clip with some footage from the musical!!!! Hiro-kun is nearly unrecognizable as the tough, cool Sanzo. He talks in such a deep voice, too! Very, very different than any other roles I've seen him in. He's such an awesome performer!! Actually, everyone in the cast looks great! I've got to start saving my pennies....