Mount Monomi, Mountain summit in Higashimatsuyama, Japan

Mount Monomi is a 134.9 m summit in Higashimatsuyama, the highest point of the Hiki Hills. Its slopes, from the foot to near the top, form Monomi-yama Park, a municipal park. Saitama Prefecture Route 212 crosses the summit in a straight line.

Mount Monomi, 134.9 m high, is the highest point of the Hiki Hills. Its name comes from Sakanoue no Tamuramaro, who is said to have climbed it to survey the surroundings during his eastern campaign. On 29 March 1922 the area was designated a Saitama Prefecture cultural property as the "Monomiyama Iwadonoyama Kannon no Katsu" scenic site.

The mountain is known for its roughly 40,000 azaleas, which bloom across the slopes from the foot to near the summit. The name comes from Sakaue no Tamuramaro, who is said to have climbed here during an eastern campaign to survey the surrounding land. Near the summit stands the former teahouse Hinoideya, and the tenth temple of the Bando pilgrimage, Iwadono Kannon, sits beside the mountain.

Mount Monomi lies about 3.2 km west of Koshigaya Station on the Tobu Tojo Line; from the station's west exit bus stop 2, Kawagoe Kanko buses TA01, TA02 and TA03 reach the Daito Bunka University stop in 7 minutes, one minute on foot from the summit area. By car it is about 6 km from the Higashimatsuyama Interchange and 9 km from the Tsurugashima Interchange. A bus stop named Monomiyama Tozanguchi exists near the foot, but no trail starts there.

The summit is crossed by Saitama Prefectural Route 212, a straight road linking the Koshigaya area with Hatoyama New Town. Near the top stands Hinoide, a former teahouse that once served travellers on the old road from Koshigaya to Ogose.