KUBT, which signed on in January 1979 as KPIG (a disco station) and later became album oriented rock-formatted KMAI, has been a rhythmic top 40 in its two incarnations, from 1986 to 2010 (it picked up the KIKI calls in 1989, and was known as "I-94" until 2003, later rebranded as "Hot 93.9" until 2010), and since September 2, 2016, when it returned to the format as the current "93.9 The BEAT."

On September 2, 2010, at Noon, KIKI-FM changed their format to rhythmic adult contemporary, branded as "93.9 Jamz" and picked up the new calls KHJZ (previously used on a radio station in Houston).

"[5] Billing itself as "Hawaii's #1 Hit Music Station," the playlist features a broad mix of Rhythmic Pop/Dance currents, the same type of presentation also played at rivals KDDB and KPHW.

In 2018, the station changed their slogan to "Hawaii's #1 for Hip Hop and Hits" due to rivals KDDB and more specifically, KPHW, leaning back towards a Top 40 (CHR) format.

On September 9, 2016, KUBT's Rhythmic Adult Contemporary format moved over to the HD2 and FM translator, where it was relaunched as "99.1Jamz", with more emphasis on recurrents and Classic Hip-Hop tracks.