
Slack-key guitar (kī hō'alu) is a Hawaiian fingerstyle tradition for steel‑string acoustic guitar distinguished by "slacked" open tunings, flowing treble melodies, and a steady alternating bass played by the thumb.
It emphasizes ringing open strings, harmonics, and graceful vamps that frame vocal or instrumental melodies tied to Hawaiian poetry and place names. The result is a relaxed, singing guitar sound that can feel both intimate and spacious, often accompanying hula or standing alone as a solo art.
Guitars arrived in Hawaiʻi with Mexican and Spanish vaqueros (paniolo) in the 1830s–1840s. Local players adapted the instrument, loosening ("slacking") strings to form resonant open chords that supported Hawaiian vocal styles and hula. This gave rise to kī hō'alu—slack-key—an idiom transmitted within families and rural communities.
Through the early 1900s, slack-key remained largely a home and community practice. Radio and territorial-era performances gradually expanded its audience. While steel guitar and ukulele often grabbed national attention, slack-key persisted as an intimate, vocal-accompaniment and solo tradition.
From the 1960s, artists such as Gabby Pahinui, Sonny Chillingworth, Leonard Kwan, and Raymond Kane brought slack-key to stages and records, crystallizing its repertoire and techniques. Their work aligned with a broader Hawaiian cultural resurgence, elevating kī hō'alu from household style to a celebrated concert art. The Pahinui family, the Beamer family, and later Ledward Kaapana and Cyril Pahinui helped define contemporary standards.
Festival circuits, instructional books, and recordings by Ozzie Kotani, Keola Beamer, Jeff Peterson, and others spread slack-key worldwide. Players integrated jazz voicings, classical nuances, and new harmonies while retaining essential hallmarks: open tunings, alternating bass, and lyrical treble lines. Today, kī hō'alu thrives in solo concerts, hula accompaniment, film/new age crossovers, and educational programs in Hawaiʻi and beyond.





