Sunmori stands for Sunday Morning Ride. This term is usually used by the motorcycle community when they will ride together on Sunday in the morning,
Sunmori or Sunday Morning Ride is a riding activity on Sunday morning which is carried out by individuals or groups.

Sunday Morning Ride or more often called Sunmori is a riding activity carried out on Sunday morning. So you don't have to be surprised if Sunday mornings in some tourist attractions there are many motorbikes. Sunmori is more closely used for bikers who use sport bikes or big motorbikes.