Crystal Kay「Call me Miss…」（2006/2/22）I KnowStrings: Gen Ittetsu Strings

Crystal Kay「Call me Miss…」（2006/2/22）KTKStrings: Gen Ittetsu Strings

小原明子「虹色タイムマシーン」（2002/7/3）虹色タイムマシーンStrings: Gen Ittetsu Strings

Crystal Kay「FLASH」（2010/6/16）OutroStrings by GEN ITTETSU Strings

Crystal Kay「FLASH」（2010/6/16）I prayStrings by GEN ITTETSU Strings