• WELCOME U - Kohei by SIMONSAYZ - 2021-01-13
• GET STARTED - Kohei by SIMONSAYZ - 2020-11-25
• T.D.D LEGEND - Kohei by SIMONSAYZ - 2019-02-27
• MOVING - Kohei by SIMONSAYZ - 2018-02-14
• DIAMOND BEAT - Kohei by SIMONSAYZ - 2018-02-14
• Carry on - Kohei by SIMONSAYZ - 2017-09-06
• till the morning comes - Kohei by SIMONSAYZ - 2017-02-08
• FIRE - Kohei by SIMONSAYZ - 2017-01-25
• ビーバイブレーション - Kohei by SIMONSAYZ - 2016-02-17
• オレンジ - Kohei by SIMONSAYZ - 2015-10-28
• my life my time (GLIND HOP) - Kohei by SIMONSAYZ - 2015-08-26
• HOT LOVER - Kohei by SIMONSAYZ - 2015-08-26
• One sky,One way - Kohei by SIMONSAYZ - 2015-07-29
• 夏色キャンディ - Kohei by SIMONSAYZ - 2015-06-24
• 運命のLady 音羽慎之介センターver. - Kohei by SIMONSAYZ - 2015-03-25
• HOME 〜みんなの帰る場所〜 - Kohei by SIMONSAYZ - 2015-03-18
• マジでJIN JIN - Kohei by SIMONSAYZ - 2015-03-04
• 愛、花のように - Kohei by SIMONSAYZ - 2015-02-25
• ZENKAI PLAY - Kohei by SIMONSAYZ - 2015-02-04
• Elements - Kohei by SIMONSAYZ - 2014-12-03
• over and over - Kohei by SIMONSAYZ - 2014-12-03
• マイペース - Kohei by SIMONSAYZ - 2014-10-29
• Deep Moment - Kohei by SIMONSAYZ - 2014-08-20
• Sweet & Sweet CHERRY - Kohei by SIMONSAYZ - 2013-11-13
• Golden Time - Kohei by SIMONSAYZ - 2013-11-13
• U R my Sunshine! - Kohei by SIMONSAYZ - 2013-09-18
• ともだちのうた - KOHEI by SIMONSAYZ - 2013-06-26
• HEY!!! - Kohei by SIMONSAYZ - 2013-02-13
• Miracle 〜song for you〜 - Kohei by SIMONSAYZ - 2013-02-06
• 運命の引力 - Kohei by SIMONSAYZ - 2013-02-06
• AUTOMATIC SENSATION (OAD Ver.) - Kohei by SIMONSAYZ - 2012-10-24
• Sunset Sky - Kohei by SIMONSAYZ - 2012-07-18
• UTAO - Kohei by SIMONSAYZ - 2012-04-04
• Glorious day - Kohei by SIMONSAYZ - 2012-03-07
• Hikari - Kohei by SIMONSAYZ - 2012-02-15
• AUTOMATIC SENSATION - Kohei by SIMONSAYZ - 2012-02-14
• ア・ナ・ロ・グ - kohei by SIMONSAYZ - 2011-03-16
• Number One - Kohei by SIMONSAYZ - 2010-11-24
• my life my time - Kohei by SIMONSAYZ - 2010-11-24
• 夜空へ - Kohei by SIMONSAYZ - 2010-06-16
• Bang!バンザイ!! - Kohei by SIMONSAYZ
• マジでJIN JIN - Kohei by SIMONSAYZ
• Pinkish Heart 愛 - Kohei by SIMONSAYZ