What do you mean ? Is it because the theme is about sentais (power rangers in america)?
Sentais/tokusatsus are practically part of a culture there already. Every year at least 2-4 sentais and tokusatsu series are made. And each of them usually runs weekly for a full year long. And this has been going for at least 30-40 years.
Basically, if you're a children in Japan, your childhood are ,most likely than not, introduced to these shows. So a game with these theme is not exactly weird for Japanese imo.