Hachi is portrayed by three dogs: Chico, Layla, and Forrest.
On May 19, 2012, a bronze statue of the Japanese dog Hachiko was unveiled at the train depot at Woonsocket Depot Square where the film was shot. It is an exact replica of the bronze statue of Hachiko which resides in front of Shibuya Station in Japan.
After Hachiko's Master died, Hachiko was taken in by the Gardener of the Ueno family.
When Parker searches information about Akita on Internet, he comes across a picture of Ueno and Hachiko from 1924.
Hachi is a Japanese Akita/Akita Ainu from the mountainous northern regions of Japan.