[Nyororin]

I think you`re going to have a very very hard time.
Even the fanciest restaurants are going to contain MSG - although not sprinkled in. It`s generally extracted from seaweed right there in the shop. Anything with 昆布 or 昆布エキス is also going to contain quite a lot of it...

I think that you`ll probably find the only way to avoid it is to cook for yourself and avoid anything with naturally occurring MSG (ie. Anything containing seaweed).