Kasper Kaan Özden Kairinen (born 22 December 1998) is a Finnish professional footballer, who plays as a central midfielder for Czech First League club Sparta Prague and the Finland national team.

[12] Kairinen scored a goal and provided an assist in his debut in Czech First League on 5 February 2023, in a 4–1 home win against Mladá Boleslav.

[15][16][17] Kairinen recorded 12 appearances and provided four assists in Sparta's 2023–24 UEFA Europa League campaign, helping his side to advance to the round of 16, where they were eventually defeated by Liverpool.

He missed the start of the 2024–25 season due to a leg injury he suffered in May,[21] and returned to the line-up in the end of July 2024, in a win against FK Teplice.

[27][28] A former regular youth international, Kairinen debuted for the Finland senior national team on 8 January 2019[29][30][31] in a friendly match against Sweden, as a substitute for Rasmus Schüller in the 54th minute.