The garden is a living reminder of one of San Jose's sister cities: Okayama, Japan. The Japanese Friendship Garden was dedicated in 1965 and its design is inspired by the Korakuen Garden in Okayama. The original koi fish were brought over from Okayama, too. It's a beautiful backdrop for photos and a great place for a quiet stroll.
I think the park, like others in San Jose, has been affected by the city's budget cuts. The tea house in the garden looked empty and there was not a single koi fish to be seen. Luckily there is still enough of a budget to keep up with the park's landscaping, because the gardens are clean and manicured. Maybe when times are better, the koi will be back, too.