Grandma's room
 

I found these toys while cleaning out my Grandma's room. What are they and should I be worried?

Any idea how I can ID these? I think one is and 10" popy bandai kikaira.

All are japanese live action super-heroes from the 70's.
1 & 2 : look like Rainbowman
3 : Thunder mask
4 : Triple fighter
5 : Ryusei ningen zone (zone fighter)
6 : Godman
7 : jinzo ningen kikaider
8 : doesn't look like anyone from an actual show, probably a bootleg