Ogose Town, Iruma County, is home to the Ogose Plum Grove, one of the three largest plum groves in the Kanto region. For this reason, the town's trees are plums. The Ogose Plum Grove also has an impact on industry. Famous sites include Kuroyama Santaki and Yamabuki no Sato. Events in Ogose Town, Iruma County, include the Memorial Service for the Tomb of the Unknown Soldier in May, the Ogose Festival in July, and the Hydrangea Highway Festival. Neighboring municipalities include Hanno City and Moroyama Town. The town is also known for its difficult-to-read name, "Ogose," which is thought to have evolved from the fact that residents of this region once had to cross a ridge to travel to and from the Chichibu region.