Kochas is a town in Rohtas district of Bihar state, India. The most famous cultural event of Kochas is Krishn Lila unfortunately it is known and famous as "Kans Lila". Beside Krishn Lila other famous cultural activities are Chhath Pooja, Durga Pooja and other religious functions. Kochas's Surya Mandir sun temple is identity of Kochas.