Kiyoshi Ryujin (清竜人, born in March 27, 1989, in Osaka, Japan) is a japanese singer-songwriter. He released his first single, "Morning Sun", in March, 2009, through Toshiba EMI. His latest album is REIWA, released May, 2019. He also works as a producer, having penned songs to artists such as でんぱ組.inc, 堀江由衣 and ももいろクローバーZ. In 2014, he created the 'polygamous idol group' 清竜人25, releasing a total of 6 singles and 2 albums. In 2016, he started a solo project called 清 竜人TOWN.