01 / Kurino-cho Hanashobu Natural Southern Limit Zone
As Japanese silver grass spread and iris dwindled,cutting began with the Agency's permission.
Mikazuki Pond, a national Natural Monument, is in Koba. The town's site (updated June 2023) says wild iris has declined as silver grass has spread, so the grass is cut in late June and mid-October with permission from the Agency for Cultural Affairs. Flowering is usually late May to June, peaking in mid-June.
- National Natural Monument (designated 1938)
- Flowering usually late May to June
- Grass cut in late June and mid-October
