[2] Although enrollment has fluctuated throughout the years along with changing community demographics, the school currently serves approximately 1,100 students in grades 9–12.

Compared to the Hawaii Department Of Education district, Henry J Kaiser High School has achieved a higher graduation rate by about 6%.

Kaiser is situated in Hawaiʻi Kai, a small upper-middle class suburban community in East Honolulu on the island of Oʻahu.

The driveway leading up to the school is lined with large palm trees, a distinctive feature of the campus.

Koko Crater, a dormant volcano, rises up near its east side and is featured on its seal.

Notable aspects of the school include: a School Community Council; comprehensive athletic and non-athletic co-curricular activities, the latter particularly focusing on community service; student government and leadership classes; an athletic complex, serving both the local community and the state; a Communications Arts & Technology learning center; Project Hoʻolokahi, a program working in conjunction with the Polynesian Voyaging Society; Air Force JROTC; AP and Honors courses; a music program, the Kaiser Cougars Band (consisting of both marching and symphonic band) and Orchestra ; a four-year Guidance Program (KAP); and a code-of-conduct and attendance policy.

The 8th to 12th grader can take an AVID class, and it is driven by the WICOR method, which stands for Writing, Inquiry, Collaboration, Organization and Reading.

[10] Notable head coaches also include Kaiser alumnus Rich Miano, and former Weber State standout Cameron Higgins.