January ranking rewards
1 to 5: 41cm連装砲改二(41cm twin gun mount kai2), 三式弾改(Type 3 shell kai), Ju87C Kai2 (w/ KMX/skilled), SK + SG Radar
6 to 20: 41cm連装砲改二(41cm twin gun mount kai2), 三式弾改(Type 3 shell kai), Ju87C Kai2 (w/ KMX/skilled)
21 to 100: 41cm連装砲改二(41cm twin gun mount kai2), 三式弾改(Type 3 shell kai), Ju87C Kai2 (w/ KMX)
101 to 500: 三式弾改(Type 3 shell kai), Ju87C Kai2 (w/ KMX)
With the update today, now Type 3 shell has extra bonuses when equipping by Kongou class kai2.
Type 3 shell kai has extra bonuses when equipping by Kongou class and Nagato class kai2.
41cm twin gun mount kai2 has extra bonuses when equipping by remodeled aviation battleships such as Ise class and Nagato class kai2.