These seem to be called something like Sakura Gumi Hokuto Dream Academy - please correct me if needed!
@ Hakodate Winter Festival, February 2012 - well it sure wasn't summer, not a bikini in sight, LOL!
... and in this one, they seem to be at Sendai, but it also seems to say they are from Hokkaido (so maybe performing in Sendai?) - and they have something to do with plans for the shinkansen to come to Hokkaido??? in 2015 - see the description of this YouTube, and go to Google Translate and see if you can get better sense out of it. What I got was:
"Sakura Gumi College of the North Star is an idol dream of Hokuto Gotouchi unit / Hokkaido, formed for the purpose of ...
Towards the bullet train scheduled to open in 2015 (tentative name) new Shinkansen station Hakodate, Hokkaido, targeting
local revitalization and tourism PR".
Anyway, quite a long performance including:
I wanted to (AKB48)
Hatsukoi Dash (I want to run the corridor)
Southpaw (Pink Lady)
Heart-type virus (AKB48)
Song GO! ⇒ original to the North Star
Loud Diamond (AKB48)
(blame Google Translate!)