|Birth name||Ernest Kaleihoku Kaʻai|
|Also known as||Ernest Kaʻai|
Honolulu, Oahu, Hawaii
|Associated acts||Kaʻai's Royal Hawaiian Troubadours|
Ernest Kaʻai (1881–1961) was considered by many to have been the  foremost ukulele authority of his time, cited by some as being "Hawaii's Greatest Ukulele Player". Kaʻai, who was born in Honolulu, Hawaii, was said to have been the first musician to play a complete melody with chords.
A musical director at many Honolulu hotels, Kaʻai hired Johnny Noble in 1917. He was a multi-talented empresario who was also a live performer and teacher, as well as a talent organizer and booking agent, composer and music publisher, and author of instructional manuals.
Kaʻi ran the Kaʻai Ukulele Manufacturing Company, which he sold in 1917 and bought shares in the Aloha Ukulele Manufacturing Co.
In 1923, Kaʻai toured the Far East and Australia, moving to Sri Lanka. He planned to open a "Hawaiian Village" in Shanghai, China, but the Second Sino-Japanese War changed his plans and he returned to Hawaii in 1937.
By 1941, Kaʻai was living in Miami, Florida. The National Guitar Convention in Cleveland, Ohio on August 13–15, 1944, was entertained with a benefit concert by a Miami girl quartet with Kaʻai as the quartet's director. Kaʻai opened the Kaʻai Music Studios, which in 1946 provided a string ensemble for a December 27–28 Orange Bowl Celebration. The Miami News of May 29, 1949, reported Kaʻai would be accompanying vocalist Lucile Keyes for her June 4 performance at a fashion show during Fiesta. June 1950 found Kaʻai one among 200 volunteers in rehearsals for the 10 Youth Roundup Goodwill Units.
Ernest Kaleihoku Kaʻai died in Miami in 1962.
Sheet music and instructional books published by Ernest Kaʻai 
Kaʻai, Ernest K (1906). The Ukulele, A Hawaiian Guitar and How to Play It. Wall, Nichols.
Kaʻai, Ernest K (1910). The Ukulele, A Hawaiian Guitar and How to Play It, Revised. Wall, Nichols. ASIN B00088G7M4.
Kaʻai, Ernest K (1916). The Ukulele and How It's Played. Hawaiian News Company Ltd. ASIN B0049X43HA.
Kaʻai, Ernest K (1917). Kaleihoku (hula). A wreath of stars. Honolulu.
Kaʻai, Ernest K; Kinney, Ray; Noble, Johnny (1920). Across the Sea sheet music. Miller Music Inc. ASIN B0015EIZQQ.
Kaʻai, Ernest K; Carlson, Bert H (1926). The Native Sons of Aussie sheet music. Ernest K Kaai.
Kaʻai, Ernest K (1926). Kaʻai's Method for Hawaiian Guitar sheet music. Chart Music Pub. House, Inc. ASIN B003391F22.
Kaʻai, Ernest K (1940). Kaʻai's Enchanting Melodies Of The Islands For Hawaiian Guitar. Chart Music Pub. House, Inc. ASIN B0012O0PQM.
Kaʻai, Ernest K (1940). The Hawaiian hula instruction : complete in 10 easy lessons / [compiled by Ernest K. Kaai.]. Royal Hawaiian Distributing Co.
Kaʻai, Ernest K (1941). Songs of old Hawaii. E 7th tuning Hawaiian and Electric Guitars. William J. Smith Music Co. ASIN B0000CY1FD.
Kaʻai, Ernest K (1946). Kaai's Hawaiian guitar method. Chart Music Pub. House.
- "Ernest Kaleihoku Kaai". The Ukulele Hall of Fame Museum. Retrieved 24 May 2010. The Ukulele Hall of Fame Museum
- Todaro, Tony. "Kaʻai". Square One. Retrieved 24 May 2010. Square One
- King, John. "Hawaiian Guitar and Ukulele Makers". NALU Music. Retrieved 24 May 2010. NALU Music
- "The Hawaiians". NZ Truth. 10 November 1927.
- "4 Miami Girls To Carry Florida Charms North". The Miami News. 13 July 1944.
- "New Year's Festival To Be The Greatest Here". The Miami News. 1 December 1946.
- "A Dream Come True". The Miami News. 29 May 1949.
- "200 in Goodwill Units Start Rehearsals". The Miami News. 23 June 1950.