B5N and B6N were very often used in 1943+ as a recon aircraft and equipped with radar. The Yagi radar anntenaes on the wing leading edge and sides of the aircraft reduced the speed by about 5 knots, but it was all worth it. B5N and B6N could try after that a night attacks. I was always curious how actually looked the operation of transmitter and receiver looked like, how hard it was for a gunner to learn to effectively use it. In fact I'm curious if any H-6 radar is in state allowing to use it.
According to what I read it was roughly equivalent to US SCR 521 or British ASV MK. II radars, but was harder to operate.