There are 6 models in the 700 range the first 4 are detailed in the First Models English section and the other 2 below
These are Session 11 models only, there is no SE equivalent, released in 1987 at 68,000 yen production ended in 1988. There are two guitars the 703j and the 712j differing only in the pickup combinations SSS and SSH respectively. These guitars are virtually identical to the 903p and the 912p except they lack the active pickups and associated circuitry and maybe slightly different construction. They like the 900p range are described as traditional custom models. I don't know for certain what the j means but all the j models I have come across appear to be released only as Session 11s so I am inclined to believe it means Japan domestic issue only.
Specifications 703j
Body Maple on Alder
Neck Maple
Fretboard Rosewood 22frets 648mm scale 350mm radius
Headstock Matching 1 bar across Yamaha Session ii Traditional Custom on no model number anywhere
Tuners Diecast
Pickups 3 EMG Single coils
Controls 1 volume 2 tone 5 way switch
Nut 41mms locking
Hardware Gold
Bridge Gold Traditional style
Pickguard Black ply
Colours All said to be Tiger Top at least Sunburst a Navy Blue and a Green
Years available 1987 and 1988
Specifications 712j
Body Maple on Alder
Neck Maple
Fretboard Rosewood 22frets 648mm scale 350mm radius
Headstock Matching 1 bar across Yamaha Session ii Traditional Custom on no model number anywhere
Tuners Diecast
Pickups 2 EMG Single coils and 1 EMG Humbucker
Controls 2 volume 1 tone 3 way switch push push coil tap
Nut 41mms locking
Hardware Gold
Bridge Gold Traditional style
Pickguard Black ply
Colours All said to be Tiger Top at least Sunburst a Navy Blue and a Green
Years available 1987 and 1988