@Field:
Don’t put too much faith in Long Lance torpedos. Sure when they hit its great but if you don’t get 6’s they are pretty crappy and you will regret building an entire navy based on a 1 in 6 chance of hitting with torps. You can trust me on that one, ive been there many times and don’t build exclusive LL navys anymore. Go with a good mix of Japanese gunnery from the heavy cruisers and back it up with LL’s from the light cruisers and destroyers. But bear in mind destroyers rarely make it past turn 3 also.
The key is to fire soo many torpedoes that a 1/6 odds is all you need, i won a 8player OOB tournament as Japan (im ranked #1 outside the USA on the forum mini) with
Musashi
Soryu
Elite zero x 3
Zero x1
Haguro
Chikuma
Murasame
Shigure
Hatsukaze
Isokaze
I was sinking 6 hull BB’s in one turn with Just LL torpedo’s and the other Japan squads I was going up against though I won I lost my musashi the exact same way to them in one turn as well on 2 occasions. With range 3 torps and LL the IJN DD’s and cruisers are more then worth their weight.