Futagoyama: Steep Limestone in Chichibu, Mostly 5.11 and Up, Wet in the Rainy Season and Summer | Japan Climbing Crags
A limestone sport crag in Ogano, Saitama, with walls at 90–135 degrees. CLIMBING-net lists 160 routes and ROCKTOPO 220, concentrated in the 5.11 and 5.12 range. CLIMBING-net calls it a year-round crag but notes seepage in the rainy season and summer. By transit it takes two buses from Seibu-Chichibu Station to Sakamoto plus a hike up to Matatoge; most climbers drive up the forest road.