Which model is this? J2M2, J2M3 or J2M5...? I hope it doesn't behave like a N1K1/K2 (i.e., like a brick).
j2m is heavier in controllability than n1k-j, imho. at least baugher mentionned that maneuverability comparable to reisen's one. on the other hand j2m is descibed by baugher as a flying brick. so, dunno about how successful shiden is modelled here, but j2m must be a brick shot upward from cannon. anyways, japanese will have ability for high-alt intereception with raiden.
so, shiden has not a bad turn, as described. and jams in dive, as described. speed and firepower as described, imho.