Don’t Be A Baka, Celebrate The Ninth Anniversary Of “Cirno’s Perfect Math Class”

Recent anime relevent Twitter, the name of doujin bullet hell shooter turned phenomenon Touhou Project is a Jojo’s Bizarre Adventure: Diamond Is Unbreakable tribute….  Josuke’s family name 東方 (“Higashikata”), can also be read as “Touhou.” A popular element of the phenominon is IOSYS Cirno’s Perfect Math Class, music video story of a dim ice fairy’s education. In 2017, this turns 9 years old (part of the gag,  ⑨. バカ, lit. “9. Idiot”) and IOSYS is preparing to celebrate.


An anniversary project site has launched at

Plans include live-performances, a remix contest, goods and more.  Other than listing that a t-shirt, keychain will go on sale January 14th, specifics haven’t been shared yet.


Scott Green is editor and reporter for anime and manga at geek entertainment site Ain’t It Cool News. Follow him on Twitter at @aicnanime.