Make the 'chute itself a perk if you're flying a Japanese plane.
As for weapons, they should be perked as well. Provide a sliding scale from a measly 7.65 mm (a .32 pistol, which seems to have been common in the military in this era), to a 9 mm short (.380 ACP for you 'Mericans), to a 9 mm Luger (plain-Jane 9 mm Parabellum), to a honking big .45 ACP (available to all but being cheaper in perks if you're flying American iron - presumably other Allies can get their hands on one...and so can Axis, presumably confiscated from shot down flyers).
Hmmm...what else...oh, yeah...if you're flying a Japanese plane, you can get perked an officer's sword. Why shoot someone dead when you can sneak up on them and Banzai chop them to little pieces?
