The story
It was founded as Sakaguchi Kikai Seisakusho Ltd., and renamed to Kanematsu Kiko in 1944 then Daifuku Machinery Works Co., Ltd. in 1947. Its modern name Daifuku Co., Ltd. has been used since 1984.
The company name consists of two parts: Dai is one of the names for the character 大, and refers to Osaka (大阪市); fuku refers to Fukuchiyama, Kyoto, which was its second production location at the time.
From Wikipedia’s article on Daifuku (company), shared under CC BY-SA 4.0.6