Thanks for the comments. The way I see it, shortly after the war some Willys hung around Japan for a while which inevitably resulted in an occasional jeep-suzuki love child so it's really just nature at work.
The willy's hood and grill fit so well it's almost like it was made for it.
forgot to put some specs. 1.3 suzuki POWER, 6.5:1 t-case, Toyota axles with 5.71's and powertrax lockers.