Radion! Special! Vol.1 (『らじおん!スペシャル! Vol.1』,Radion! Special! Vol.1) is the first special album by Ho-kago Tea Time about the web radio show "Radion!" which aired from the 9th of February to the 25th of September 2009, containing several abstracts of it. The show was moderated by the five voice actresses of the members of Ho-kago Tea Time (Aki Toyosaki, Yōko Hikasa, Satomi Satō, Minako Kotobuki and later Ayana Taketatsu), who talked about their opinions on the anime, characters, songs and other topics. The album was released on the 24th of February 2010 in Japan by Pony Canyon.
Additionally, the album contains a special version of the "Character Image Song" Let's Go, which is a mix of the five previous versions.
Radion! Special Vol.1 Start! (「らじおん!」スペシャルVol.1 スタート!,Radion! Special Vol.1 Start!)
K-ON! Introquiz (「けいおん!」イントロクイズ,K-ON! Introquiz)
“Ra!” “Di!” “O!” “N!” Dotou no 26 Renpatsu (「ら!」「じ!」「お!」「ん!」怒涛の26連発,“Ra!” “Di!” “O!” “N!” Dotou no 26 Renpatsu)
Radion! Otayori Corner Special (「らじおん!」おたよりコーナースペシャル!,Radion! Otayori Corner Special)