Nozuka Pass (野塚峠, Nozuka-totsuge) is a mountain pass in the south-end of the Hidaka Mountains of Hokkaidō, Japan. The pass is at 1,230 metres (4,035 ft), but Japan National Route 236 uses the Nozuka Tunnel (野塚トネル, Nozuka-toneru), which passes 645 metres (2,116 ft) below the pass. The pass is 21.4 kilometres (13.3 mi) long. The road is 5.5 metres (18 ft) wide with a maximum grade of 6%. The minimum curve radius is 70 metres (230 ft). Snow is possible on the pass from October to April.