An annual autumn festival held to celebrate the beautiful changing leaves of the area. The well-known Momiji-Tunnel is a highlight, with evening illuminations from sunset until 10 p.m. There will be food stalls, performances and local specialties to try, with crowds expected for weekends. You can see a map of the festival on the event site (in Japanese) here.
The nearest bus stop os the Ichika Kubota Art Museum stop, which is on the loop routes and local bus services.
Organizers may cancel events, alter schedules, or change admission requirements without notice. Always check official sites before heading to an event.