CJSU-FM is a Canadian radio station that broadcasts at 89.7 FM in Duncan, British Columbia. The station is owned by Vista Broadcast Group and broadcasts an adult hits format branded as 89.7 Sun FM.

The station originally began broadcasting in 1964 as CKAY at 1500 AM, until the switch to the FM dial was made on August 1, 2000, and the station recalled.

• 89.7 Sun FM
• CJSU-FM at The History of Canadian Broadcasting by the Canadian Communications Foundation
• CJSU-FM in the REC Canadian station database

48°51′37″N 123°45′25″W / 48.86028°N 123.75694°W / 48.86028; -123.75694