Minako Kotobuki
Toyosaki's first musical performance was with fellow voice actress Eri Kitamura on the image song CD on 23 April 2008. She then performed the opening and ending themes of the 2009 anime series "K-On!", "Cagayake! Girls" and "Don't say 'lazy'", respectively, with voice actresses Yōko Hikasa, Satomi Satō, and Minako Kotobuki. Both themes were released as singles on 22 April 2009. The "Cagayake! Girls" single sold about 62,000 copies during its debut week, ranking fourth on Oricon's latest weekly singles chart, while the "Don't say 'lazy' " single sold about 67,000 copies during its debut week, placing second on the chart. The opening and ending singles remained on the chart during the week of 27 April to 3 May, falling to sixth and fifth, while selling an additional 19,963 and 22,094 copies. On 23 June 2009, "Don't say 'lazy'" was awarded Animation Kobe's "Best Song" award.