SPEED, the idol-type dance-and-vocal group whose members (Hitoe Arakaki, Takako Uehara, Eriko Imai, Hiroko Shimabukuro) are all from Okinawa Prefecture, was…
As an aside, Empress Suiko, the 33rd emperor of Japan, was a female sovereign, but for some reason Westerners have some mysterious perceptual disorder or learning disability or Mandela Effect going on, and the mistaken idea has spread that only men can become emperor of Japan and that all past emperors were male, and even the BBC in the UK has gotten it wrong. There should be no way to mess this up, since we learn it as a set together with the fact that Prince Shōtoku was regent.
This case is part of the Mandela Effect case database based on "The Window of Opportunity: A Guidepost to the Mandela Effect — The Ultra-Secret X-Files" by Aoyama Takuto.