starting lines in the ring
In sumo, the two white lines drawn in the center of the ring from which wrestlers start their bout.
力士たちは仕切り線に手をついて立ち上がる。
The wrestlers place their hands on the starting lines and stand up.
Compound of 仕切り (shikiri, 'partition' or 'starting posture in sumo') and 線 (sen, 'line').