1. A memorial card sent by the family to distinguished guests after the death of Matsukawa Toshitane (March 7, 1928). He was a high-ranking officer in the Japanese Army, initially serving under the military genius Nogi Maresuke. He participated in the First Sino-Japanese War, was one of the first high-ranking officers to enter Pyongyang, Korea, and later distinguished himself in the Russo-Japanese War. 2. After the attack on Pearl Harbor, the US military implemented plans to bomb the Japanese mainland. To anticipate US aircraft attacks, observation posts were set up on mountaintops. This small wooden sign served as a check-in for the shift workers. These observation posts were not military institutions but were established by civilian militia organizations in Japan. Their purpose was to reduce losses and casualties through advance warning. This small wooden sign (the owner's seal is blurred, but it seems to belong to someone named Okagawa) carries a lot of history and is worth collecting. 3. A message flag, 40x40 cm.