Ehm KT i dunno how much you know about Japanese ASW weapons of ww2 but they were rather primitive compared with what the Allies fielded...
also Lorna was not the best and most sophisticated of ASW aircraft so the weapons fit is quite ok IMHO...
It has 250kg Bombs or depth charges.
It is an Anti-Submarine Light Bomber.
It can also Fitted with 1 or 2 forward firing 20mm type 99 cannon
Ohh, Speaking of which. It has Three addition Equipment. The Type 3 MAD (KMX) Type 3 Ku-6 Model 4 Radar and ESM Antenna equipment..
It can Added with 250kg of bombs or Depth Charges..
Best Regards KT503