The 5th is one of the 24 solar terms, and is said to be the time when insects that have been hibernating in the winter begin to move. Komo-maki is a traditional extermination method that lures pests that can kill pine trees into a warm "komo" wrapped around a tree during the winter.
There are approximately 100 pine trees at Hikone Castle in Hikone City, Shiga Prefecture, and in the morning, in the light rain, 13 staff members worked to remove the ``komo'' that had been wrapped around them.