Its a bit more complicated than that. Toei saw the decline in Super Sentai's popularity, less fans each seasons, so they decided to make a reboot, Project RED. Though little info about it, it seem to be a combination of Super Sentai and Metal Heroes
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Rhaps
Rhaps
Kamen Rider is more popular with its more mature themes, the franchise is still stable. While Super Sentai's audience grows up.
And partly due to the two franchise being owned by 3 different companies, expanding both of them oversea is hard. KR is being carried by oversea fans.
And partly due to the two franchise being owned by 3 different companies, expanding both of them oversea is hard. KR is being carried by oversea fans.