Japanese TRX use JIS not Phillips screws
Ever wonder why it is so easy to damage a screw on a Japanese made radio using a Phillips head screwdriver? Obscure, but simple, they use JIS screws not Phillips!
I haven't checked, but I think they are on made-in-Japan cars, certainly lots of other gear.
JIS screws, which pre-date Phillips by 20 years, usually have a dot or other indent on the head.
The solution is simple, buy a set of JIS screwdrivers, about $25 on eBay.