Kazuyuki Sekiguchi (関口 和之, Sekiguchi Kazuyuki; born December 21, 1955 in Niigata Prefecture) is a Japanese musician, best known for playing the bass guitar for Southern All Stars. As a solo artist, he has played ukulele. He is a fan of Hawaiian music, and is the founder of the annual Ukulele Picnic music festival in Hawaii. For over thirty years, Sekiguchi has worked with Akira Sakuma in the Momotaro Dentetsu video game series as a music composer.
Kazuyuki Sekiguchi featuring Leyona
Kazuyuki Sekiguchi featuring KONISHIKI
Watashi-no Aozora ~MY BLUE HEAVEN~ (私の青空 ～MY BLUE HEAVEN～ 'My Blue Sky ~MY BLUE HEAVEN~' 2002)
Captain Mook and The Ala Moana Strings
Kazuyuki Sekiguchi featuring Naoto Takenaka
Kuchibue to Ukulele (口笛とウクレレ 'Whistle and Ukulele' 2000)
Kazuyuki Sekiguchi and Sazan All Stars
World Hits!? of Southern All Stars (2001)
Kazuyuki Sekiguchi featuring Naoto Takenaka and Kimiko Wakeyama
Kuchibue to Ukulele 2 (口笛とウクレレ2 'Whistle and Ukelele 2' 2008)