Well, that answers that long-standing question!
I've actually tried Facebook a few times for lesser-known names we can't seem to ID here, but have come up empty handed, so congrats on this find! I think in my cases, the names were simply too common, either in English or Chinese, and brought back multiple results, none of which seemed to link up.
Still, it's definitely a crucial asset when it pays off like this.
Looks like there's some updating to be done:
At present, Nishikawa Takakazu is credited as "Tim" in FINAL EDGE, but as "Tim" is the character played by the younger guy pictured above, the character ID must now be removed.
In theory that only leaves one person in our cast list—which is as complete as we can get, as it's based on screen caps—who the younger guy pictured above could be: Yau Ming (3). This person is also listed in the cast of the Phillip Ko-directed KILLING SKILL, as well as credited as an action director (perhaps Phillip threw him a choreography gig as a bonus?), so if we could get a gallery for that film, I suspect we'd have see him there as well. KILLING SKILL shares several faces with FINAL EDGE, including . . . Nishikawa Takakazu! Anybody have this movie?
I suspect Yau Ming (3) is also in NEW DEBT COLLECTORS. I don't see the name in the recently-uploaded credits, but he is in the cast gallery, as noted in the thread related to that film.
or the older guy 
