| KOKU | |
| Airdate: | June 1, 1984 |
| Frequency: | 100.3 MHz |
| City: | Hagåtña, Guam |
| Area: | Guam |
| Format: | CHR |
| Owner: | Moy(lan) Communications |
| Erp: | 50,000 watts horizontal 49,700 watts vertical |
| Haat: | 165 meters |
| Branding: | Hit Radio 100 |
| Sister Stations: | KMOY |
| Class: | C1 |
| Website: | Hit Radio 100 Official Facebook |
KOKU (100.3 FM) – branded as Hit Radio 100 – is a commercial contemporary hit radio (CHR) radio station licensed to Hagåtña, Guam. The station is currently owned by Moy Communications, Inc. It signed on the air on June 1, 1984.
It is currently one of three CHR/Top 40 outlets on Guam, and one of two CHR outlets in the Guam market, competing against KNUT.
KOKU, which signed on on June 1, 1984, has been launched a contemporary hit radio in its two incarnations, from 1984 to 2003 (it picked up the slogan in 1989, and was known as "Guam's Party station" until 2003, later renamed as "Guam's Bomb Station" until 2006), and as of 2016, when it changed the current slogan as "Guam #1 Hit Music Station."
As of October 2, 2012, KOKU has a new sister station as KMOY, which has adult top 40 as "Cool FM 92.7".
After Typhoon Mawar hit Guam on May 26, 2023, Hit Radio 100 was off the air for more than one week until they return to air on June 2.