Bonsai (盆栽, "tray planting" About this sound pronunciation (help·info))[0] is a Japanese art form using trees grown in containers. Similar practices exist in other cultures, including the Chinese tradition of penzai or penjing from which the art originated, and the miniature living landscapes of Vietnamese hòn non bộ. The Japanese tradition dates back over a thousand years.

"Bonsai" is a Japanese pronunciation of the earlier Chinese term penzai. The word bonsai is often used in English as an umbrella term for all miniature trees in containers or pots.