From The AKR
There was an accident at the kyudojo of the Hamamatsu City High School on the 2nd of December, 2012. The arrow that was shot by a male student hit a head of a girl who was inside of the left “Kantekishi (arrow watch room)”. Her right skull was fractured. She is critical but alive.
The Kantekisho has a window and she was watching hits and misses but the arrow shot through the window (70cm x 60cm) of the kantekisho and hit her right forehead. However the police is investigating if the window was closed or not at that time. They have a rule to keep closing the window while practice.