It's the very first Super Sentai series what made many of it's successors possible. If you want to watch the original first season of the Super Sentai series. No.1 Sentai Gozyuger is the 49th Season.
The most well known Super Sentai thanks to it's first american adaptation Mighty Morphin Power Rangers and the original first Super Sentai Series Himitsu Sentai Goranger.
It's the 48th sequel of the series from Super Sentai right after Bakuage Sentai Boonboomger which is the 47th sequel. If you would like to watch the super sentai series chronologically.
