IJN CL KUKA and KITAKAMI classes are fitted with type 13 radar sets each. And CVE SHINYO & KAIYO have type 21 onboard. However, KITAKAMI class cruisers will arrive very late in the game - if ever. And the two CVE classes aren´t available in Sc17 and Sc19 camapigns.
Historically, on BB ISE a Type 21 set was installed by May 1942. And IIRC one of the japanese fleet carriers also has radar by 1942 already. I think it was SHOKAKU. Unfortunately you don´t get any upgrades as japanese player when sending ships back to the homeland.
Ahhh yeah, sounds like the CF makers need to know this.



