The Kunitomo air gun was an

air rifle An air gun or airgun is a gun that fires projectiles pneumatically with compressed air or other gases that are mechanically pressurized ''without'' involving any chemical reactions, in contrast to a firearm, which pressurizes gases ''chem ...

circa 1820, by the Japanese inventor Kunitomo Ikkansai who developed various manufacturing methods for guns and also created an

air gun An air gun or airgun is a gun that fires projectiles pneumatically with compressed air or other gases that are mechanically pressurized ''without'' involving any chemical reactions, in contrast to a firearm, which pressurizes gases ''chemica ...

based on the study of Western knowledge ("

rangaku ''Rangaku'' (Kyūjitai: /Shinjitai: , literally "Dutch learning", and by extension "Western learning") is a body of knowledge developed by Japan through its contacts with the Dutch enclave of Dejima, which allowed Japan to keep abreast of Wester ...

") acquired from the Dutch in

Dejima , in the 17th century also called Tsukishima ( 築島, "built island"), was an artificial island off Nagasaki, Japan that served as a trading post for the Portuguese (1570–1639) and subsequently the Dutch (1641–1854). For 220 years, it ...

See also