Ninja Sentai Kakuranger (1994)

It's the 17th sequel of the series from Super Sentai right after Gosei Sentai Dairanger which is the 16th sequel. If you would like to watch the super sentai series chronologically.

It's the 18th sequel of the series from Super Sentai right after Ninja Sentai Kakuranger which is the 17th sequel. If you would like to watch the super sentai series chronologically.

Both are Ninja theme seasons with hints of both dark and comedy elements
Both have only a sole female member
Both are from the Super Sentai franchise owned by toei
Both had made a crossover to Ninninger

Both are Ninja themed
Both have a female white ranger, a male red, blue and yellow ranger
Both fight against demons
Both are Super Sentai series
Both met in a crossover

Both are Ninja series owned by Toei
Both fight demons/supernatural
Both have a American Ninja
Both appeared in Ninninger
Heroes inherited power from relative or descendant

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.