Pretty much impossible to work out at this stage. AJX is closing KIX base as of August, flying going back to ANA. That leaves AJV, with US trips and China freighters. There will be heaps of deadheads as you won't be able to cover all your flying out of KIX as you will be the only pilot in that base, so you will have to position up to Narita and Nagoya to operate flights from there. You could only count therefore on your 1 day off in 7 .
If you want to live in Japan you would be far better off working for JEX/ AIR DO/ SKYMARK