Oiso Joyama Park is a Kanagawa prefectural municipal facility on the site of the former Mitsui Zaibatsu (conglomerate) Villa and former Yoshida Shigeru Residence. The park's rich environment with trees like chinquapin, evergreen oak, and zelkova is dotted with features including a tea house imbued with Japanese ambiance and a local museum. Across the road you'll find the former Yoshida Shigeru Residence with a Japanese garden that pioneered the inclusion of modernist elements.