Hayami Seiji (Japanese: 早速 整爾) was a Japanese politician during the Taishō era.

Hayami was Parliamentary Vice-Minister for Finance.

[1] In August 1925, he replaced Okazaki Kunisuke as Minister of Agriculture and Forestry in Katō Takaaki's second cabinet.

[2] He left the post in January 1926, after Katō's death.

[2]