Well, it's been some time since I decided to do some "nonsense rambles" here, right? I did remember writing about Toei's Toku in the Showa era. The Showa era was a long era starting from 1924 to 1989 under the rule of Emperor Hirohito. It was also the time when Imperial Japan sat and also the time when the empire finally sank after World War II. It was also the era of the birth of Modern Japan after seven years of the short-term American occupation. Japan eventually rose and kept rising for a long time introducing new technologies and concepts that Chinese, Taiwanese, and Korean would use a lot and improvise later on. So what's the big influence of Toei itself. Just something worth to note that I love a lot of Showa era Super Sentai while thinking the majority of the Showa era Kamen Rider seasons are not my type.
What important events happened during the Showa era? World War 2, and the long-running Cold War. The Cold War Era was a geopolitical war between the USA (with its respective allies) and the Soviet Union - a battle of an exchange of ideas. A lot of shows were influenced by the Cold War and the two major world wars. Who can remember the creation of Captain America as he battled the Red Skull? Who can remember the X-Men where they are treated differently for being born different? Who can remember Magneto's infamous storyline of him as a survivor of the Jewish holocaust? The influence was pretty much worldwide. Not to mention, Marvel did once work with Toei and Toei also took a few ideas from Marvel - such as the Japanese Spiderman and Battle Fever J.
It would be important to take a look at Toei's beginnings. One could notice the rise of two shows - Sentai (before it got Super) and Kamen Rider. There was Kamen Rider (1971) which is now called The First Kamen Rider. The first Kamen Rider show featured the Shocker Army was formed by Nazi remnants though strangely - most of its members are from Japan! In real history, there are also shock troops in real life - they are usually better trained than the rest of the troops! The Shocker troopers also did the Nazi salute and they had the tribute of the Nazi Eagle. In 1975, a new series called Himitsu Sentai Goranger began and had a two-year run. What was interesting was what Goranger's main antagonist Black Cross Fuehrer resembled a Ku Klux Klanner in many ways. The Great Leader of Shocker from the first Kamen Rider later showed a red version of the Ku Klux robe. Both shows had a two-year run making one wonder if you're willing to watch these old school shows. Sure, I do like most old school Super Sentai while I usually prefer new school Kamen Rider these days.
Just my own thoughts and nothing more!