Akashina area has three rivers running through it. Located by the rivers, Ryumonbuchi Park and Ayame Park are famous for over five million irises of 150 varieties. The Iris Festival is held from mid- to late June when the irises start blooming. There are also some other events offered by local groups. You can see irises from mid-June to November.
- Mid- to late June
- Ryumonbuchi Park and Ayame Park (Akashina)
- 10-minute walk from JR Akashina Station