Just found a live performance of Say Anything, with Toshi, Yoshiki and 4 string players. There doesn't seem to be anything information about a performance date, but I am assuming it is around December 1991, when the single Say Anything was released. (Also, they show his Selection CD at the beginning, which was released in December as well.)
PS. I haven't heard this string arrangement before, but it is very beautiful!
[youtube]http://www.youtube.com/watch?v=Rwp566e4XX4&feature=channel[/youtube]