Well man, not sure what to say.. I guess if it were me, it would depend on a few things: Where are you now, and are you needing / wanting to leave, and how badly; Does ANA offer upgrades? (I am not sure); Is this the kind of flying that you want to do and will help you in the long run if you are still looking to further your career..?
The money for FOs is still better then any regional Captain as far as I know, and descent on the global scale. The company has the oppertunity for a growth explosion if / when the postal service goes private, which is happening. Ultimatly, they will need Captains, and I would assume they would take a "Known" (previous FO) verses an unknown... Again, this is all new to me too, so I could be speaking out of turn on some of the company specifics, but the other advice applies to any job.. Hope it helps..
777BC
PS: I sent you a PM with my personal email.. I am brand new here, so it might not have worked...