http://hkmdb.com/db/movies/images.mhtml?id=11127&display_set=eng

1. Rock/Rocky - Kang Ho in the end credits (which I don't trust in the slightest0. Quite a major character, but he doesn't seem to have earned a place in the opening credits.


2. Sakura's dad - Kimura in the subtitles...

but I think it's choreographer Kwok Nga Cheung, identified as "Takeshi" in the end credits (which are woefully inaccurate on many character names). My reason for suspecting this is that he looks like:
http://creative-stunt.tripod.com/

3. Master of Chung Ching school (Master Chung?). Either Tam Wai-Kit (Master Tam in the credits) or Leung Ka Po (Master Leung in the credits)


4. Master Hung (Hung Lin School) - he's whichever 2 is not!


5. Chief Ninja. If 1 is not Kwok Nga Cheung, this guy is.


6. May (Master Shen's admirer) - entirely pointless character!


7. Sakura's mum (Mrs Kimura)


8. Tiny Fook (littlest fortune)


9. Sik Siu Lung and one of the fortunes


10. Thugs


11. Belching lady and impressed audience


12. Rock's Mum