The Type 26 or Model 26 "hammerless" revolver was the first modern revolver adopted by the Imperial Japanese Army. It was developed at the Koishikawa Arsenal and is named for its year of adoption in the Japanese dating system. The revolver saw action in conflicts including the Russo-Japanese War, World War I and World War II.

The Nambu pistols are a series of semi-automatic pistols produced by the Japanese company Koishikawa Arsenal, later known as the Tokyo Artillery Arsenal. The series has three variants, the Type A, the Type B, and the Type 14. The Nambu pistols were designed to replace Japan's earlier service pistol, the Type 26 revolver.