Hamamatsu Zoological Gardens, Major zoological park in Nishi-ku, Japan.

Hamamatsu Zoological Gardens is a municipal zoo in the Kanazanji district of Chuo-ku, Hamamatsu, next to the Hamamatsu Flower Park, with which it forms Kanazanji Comprehensive Park. Its paths connect directly to the flower park, and a combined ticket lets visitors walk through both. The primate collection, among the largest in Japan, held 67 species and 970 animals as of June 2014, including western gorillas and golden lion tamarins.

The zoo opened on 1 November 1950 on the former site of the Hamamatsu Children's Exposition in Hamamatsu Castle Park. It closed on 31 October 1982 to prepare for relocation, and reopened on 2 April 1983 beside the Hamamatsu Flower Park, its area growing to 123,000 square metres, about six times the old site. Gorillas arrived from Adventure World in 1982, and golden lion tamarins were lent by the Brazilian government in 1994.

The zoo is linked by internal paths to the neighbouring Hamamatsu Flower Park, and a combined ticket lets visitors move freely between the two. Together they form the Kanazanji Sogo Park. The name Kanazanji comes from the district, Tatemachi Kanazanji-cho, in Chuo-ku, Hamamatsu.

The zoo is served by the Entetsu bus on the 30 Kanzanji line, which stops at the Zoo bus stop. The grounds cover 123,000 square metres next to Hamamatsu Flower Park, and paths link the two sites, so a combined ticket lets visitors walk between them. The terrain is hilly and large, so allow time and wear comfortable shoes.

This zoo is the only place in Japan where visitors can see the golden lion tamarin, a rare primate with bright orange-gold fur that originates from the forests of Brazil. Very few zoos worldwide display this species.