Košarkarski klub Domžale, also commonly known as Kansai Helios Domžale due to sponsorship reasons, is a men's professional basketball club based in Domžale, Slovenia. The club competes in the Slovenian First League and the ABA League Second Division. They have won the Slovenian championship in the 2006–07 and 2015–16 seasons. Since 1981, their main sponsor has been the chemical company Helios. Their home arena is Domžale Sports Hall with a capacity for 2,500 spectators.