Japanese Friendship Garden, Japanese garden in Kelley Park, San Jose, US.

The Japanese Friendship Garden is a six-acre walled section of Kelley Park in San Jose, California. It is patterned after the Korakuen Garden in Okayama, Japan, and contains three ponds at different elevations, linked by streams. Stone lanterns (tōrō) stand among plants that are mostly native to Japan, including wisterias, lavenders, and azaleas.

The garden was dedicated in October 1965 as a walled section of Kelley Park, patterned after the Korakuen Garden in Okayama, one of San Jose's sister cities. Koi sent from Okayama stocked its three ponds in 1966. In 2009 a fish virus killed 90% of the koi, and in 2017 Coyote Creek flooded the lower pond and most of the tea house, damaging the main pumps; the tea house was repaired by 2022 while other flood repairs remain incomplete.

The garden is named for the sister-city tie between San Jose and Okayama, whose Korakuen Garden it copies. Stone lanterns (tōrō) stand among the planting; their roofs catch winter snow. The plants are mostly species native to Japan, with wisteria, lavender and azaleas flowering by season.

The garden sits inside Kelley Park at 1300 Senter Road in San Jose and is open daily from 10 AM to 7 PM. Admission is free, but the city charges for parking at Kelley Park. The tea house was repaired by 2022, though some flood repairs from 2017 remain unfinished, so parts of the grounds may still be closed.

The three ponds sit at different elevations and are linked by streams, so water moves through the garden by gravity. The koi were sent from Okayama in 1966; in 2009 a deadly fish virus killed 90% of them, and the 2017 Coyote Creek flood submerged the lower pond and damaged the main pumps.