A fan in Shenmue BBS found this video in which Yu Suzuki makes a cameo appearance.
http://www.youtube.com/watch?v=B3kF6qg5 ... ed&search=
He appears in the part that begins at 12:07 in the video. The master who is speaking
mainly in the video is Wu Lianzhi (呉連枝 "Go Renshi" in Japanese) who is credited as
"Hakkyuku-ken (Bajiquan) Motions Supervisor" for Shenmue.
Apparently, that part was shot in 1994 when Yu-san visited Meng Cun for researches.