The Touhou Souchimai Add-on for Groove Coaster has 6 achievements.
Play Touhou Souchimai 20 times
Play Touhou Souchimai and clear all of SIMPLE, NORMAL and HARD
Play Touhou Souchimai and get A Rank in SIMPLE, NORMAL and HARD
Play Touhou Souchimai and get S Rank in SIMPLE, NORMAL and HARD
Play Touhou Souchimai and get S+ Rank in SIMPLE, NORMAL and HARD
Play Touhou Souchimai and get S++ Rank in SIMPLE, NORMAL and HARD