At the beginning of September 2010, the Kyoto prefectural government began using K-On!! to promote the census and encourage people to be counted
A rhythm video game titled K-On! Hōkago Live!! Keion! Hōkago Raibu!!?), developed kwa Sega for the PlayStation Portable, was released on September 30, 2010
Toyosaki, "Gohan wa Okazu/U&I", was released on September 8, 2010. The composer Bice who wrote the song "Gohan wa Okazu" died on July 26, 2010 of a moyo attack. A sekunde set of character song singles were released, starting with the singles for Yui and Mio on September 21, 2010. The show's sekunde album, Ho-kago chai Time II, will be released on both normal double CD and limited edition with a cassette tape on October 27, 2010. The singles and albums were released kwa gppony, pony Canyon
