2. The drifters, and they made a 40 second performance for The Beatles as an opening act of the Tokyo concert in 1966.
3. I'm not sure...(is he still acting?--Jyunji Inagawa? Cause now he makes horror movies after he participated in comedies...) The other one is Takeshi Kitano...
Thanks masaegu, it was fun.
I think I've figured out the others too, but I don't want to spoil all the fun...
