Sorry to dig this thread up again, but If you look at this picture that I recently posted in the bad pics of X topic:
Then you can clearly see his hairline has receeded quite a bit. Yet on recent photos, his hairline is more or less "normal" and looks like it was brought forward , and it's led me to think that Toshi is wearing a wig or artificial hair of somesort. Either that or his hair has grown back by it's own accord (maybe stress was making it fall out) or by some remedy been used.
I know i'm thinking way too much into this and looks aren't everything but, I was shocked by that picture and never noticed before.