Well as the discussion has dried up a bit, if anyone has either cool, appropriate, inappropriate, or any other type of dance to share, as the person who did not create the thread, I would personally not object.
Here's one:
S/mileage - Asu wa Date na no ni, Imasugu Koe ga Kikitai (あすはデートなのに、今すぐ声が聞きたい) (2009)[4K AI Upscale])
Just because every member is INSANELY cute, the dance is cute, and the lolita outfits are

(imo)
Actually, this thread sort of resparked my interest in Japan idol culture. I was HUGE into Hello! Project in the 2006-2009 era. They were, at one time, the biggest idol agency in Japan with the highest selling all girl group (morning musume), however I believe AKB surpassed them at some point. What has been a bit of a bummer upon revisiting is it seems like they don't create groups for teens/preteens anymore. Now it seems like the vast majority of the current members are in their early to mid twenties, so I don't know if that is a change in trends(Kpop?), laws, company ethics or what..? Have to say I disapprove, though.
edit: here's a good performance of that same group, very high energy:
https://youtu.be/vQD4UR5SgO4?si=3iuZOq9vr_EgyfH7
You also get a glimpse of Wota-culture in action(otaku for idol groups) 30-40+ yo men chanting the girls' names, waving their glowsticks about,who probably have bedroom wallpapered with their favorite idol's photos.(yes I probably would have went if i had the chance back then

)