Hawaiʻi creeper is able to climb up and down trees. It uses its short, sharp beak to probe bark for insects residing underneath. If available, it will sip nectar from koa ("Acacia koa") or ōhia lehua ("Metrosideros polymorpha"). The breeding season of the Hawaii creeper lasts from April to July, during which female birds lay one to three eggs. Nests are hidden in a tree cavity or built on a high branch in either a koa ("Acacia koa") or a ōhia lehua ("Metrosideros polymorpha"). Eggs hatch after around thirteen days. The Hawaii creeper was put on the endangered species list in 1975;
Koa Kannon one urn was secretly collected up by a group including Miyoshi Tobita, the manager of Kuboyama Crematorium, and Shohei Sanmonji, defense counsel to Kuniaki Koiso, and on 3 May 1949 this urn was carried to the Koa Kannon temple due to its links with Matsui. Right away the head priest Master Ninrei Itami intuitively understood that these were the ashes of the seven war criminals and hid them until he thought the time was right. Finally on 19 April 1959 the stone monument of the seven warriors was erected, with the inscription written personally by former prime minister Shigeru Yoshida,