U1 Is The Main Alias Of Bemani Music Composer 浅見祐一 Asami Yuuichi Who Mainly Composes Under This Alias For The Game Dance Dance Revolution. This Alias Is A Pun On The Japanese Word For 1 Ichi Therefore Making U1 Pronounced Exactly Like Yuichi In Japanese. Some Of His Other Aliases Include U1 Jewel Style U1-Asami SAmi CLUB SPICE NPD3 Chang Ma And 2MB When Remixing Songs From Other Bemani Artists .