Help me remember a movie please

I can't think of it, but I remember a movie where a guy was either an assassin for hire or a detective and after every case his memories were wiped. I only thought of it because of a manga I was reading that was sort of similar.

I wish I could remember more but that's all I got =P

Sounds familiar. Country of origin?

pretty sure it's from USA. I don't watch a lot of foreign movies

the guy also had to regain his memories somehow I think or could only remember bits and pieces of what he needed to remember

Only one with that theme I can think of is this one:

http://www.imdb.com/title/tt0338337/

Not really exactly what you're asking for, but this is the closest thing I can think of:

http://www.imdb.com/title/tt0453467/

Manga name? Might help out.

I keep thinking of Memento, but I think I'm off.

The Manchurian Candidate?

Only one with that theme I can think of is this one:

http://www.imdb.com/title/tt0338337/

THANKS!!!

that's it =)