Graffiti written by a Japanese prisoner of war who was imprisoned in Nihang Prison around May 24, 1920 and then killed in retaliation for the Japanese army's April massacre in the Maritime Province and attack on North Sakhalin Island.
1920년 5월 24일경 니항 감옥에 수감되었다가 일본군의 4월 연해주 학살과 북사할린섬 공격에 대한 보복으로 살해되었던 일본군 포로가 적성한 낙서
{{Information |Description={{en|12:00PM, May 24, 1920. Do not forget!}}{{ja|「大正9年5月24日午後12時忘ルナ」(尼港事件の犠牲者の遺書)}} |Source={{en|Japanese book "Showa History Vol.4: Pre-Showa History - Great Kanto Earthquake"