It is said that George Lucas took inspiration from WW2 when he created his Star Wars universe. Did he create Imperial Navy bassed on IJN from WW2 ? Let's look at some similarities .
First, both Empire in SW, and Japan in WW2 are empires, with almost god-like emperors.
Second, compare uniforms of Japanese and Imperial officer below.
Third, compare Vader suit and this samurai armor.
Fourth, both IJN and Imperial Navy considered capital ships as their main strength . Therefore, Japan had Yamato-class battleships, heaviest ever. Imperial Navy built ever so large Star Destroyers, culminating with SSD.
Fifth, main fighters for IJN and Imperial Navy were Zero and Tie Fighter respectively, both very maneuverable but lightly armored , with primary function being air superiority. Almost useless for ground assault or attacking enemy ships because they could not carry heavy bombs (later in the war that changed, both in WW2 and in SW universe)