Dinas Perpustakaan dan Kearsipan
Gulat Okol or aduokolis a traditional sport that has been preserved from generation to generation by the people of Sambikerep District, Surabaya. At first glance, gulat okol is similar to sumo originating from Japan, which is a fight between two athletes facing each other. However, unlike sumo which requires a belt that also functions as pants, gulat okol wrestlers wear scarves and udeng(a square cloth tied on head).