Koko-en Garden (好古園 Kōko-en) (sometimes called Himeji Kōko-en) is a Japanese garden located next to Himeji Castle in Hyōgo Prefecture, Japan. It was constructed in 1992 at the site of the lord's west residence, to commemorate the 100th anniversary of the establishment of the Himeji municipality. The garden is about 3.5 hectares and has nine different gardens. In 2017, Koko-en signed a sister garden agreement  with Ro Ho En, the Japanese Friendship Garden, in its sister city, Phoenix, Arizona.
- "Japanese Gardens". Official Tourism Guide for Japan Travel. Archived from the original on 2010-07-04. Retrieved 2015-06-15.
- "Kokoen Garden, Traditional Japanese Garden in Himeji City". EOK. Retrieved 2010-07-04.
- "Newspaper article, translation, sister garden". Ro Ho En Board of Directors. Retrieved 2017-06-22.
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