Kazuyuki Sekiguchi is a renowned Japanese musician, best known as the bassist of the legendary band Southern All Stars, which made its debut on June 25, 1978. Celebrating its 48th anniversary, the band remains one of the most iconic and influential groups in Japanese music history, attracting 600,000 fans on their most recent Japan tour.
Beyond his career with Southern All Stars, Sekiguchi is a passionate ukulele artist. He has released seven ukulele-themed albums and authored four books on the Ukulele instrument. His ukulele tone, known for its extraordinary gentleness, is the result of decades of study and admiration of ukulele masters past and present. Through this exploration, he has developed a sound that reflects his own ideal of the ukulele’s voice. In addition to his musical pursuits, Sekiguchi is active as a writer, illustrator, and radio personality, demonstrating his multifaceted talent. Since 2009, he has organized the Ukulele Picnic in Hawaii on the island of Oʻahu in collaboration with the Ukulele Foundation of Hawaii. In 2024, the event was expanded and rebranded as the International Ukulele Festival of Hawaii, continuing to grow as a global celebration of the instrument.

Kazuyuki Sekiguchi deeply respects and maintains close relationships with many prominent figures in the ukulele world, including Herb Ohta, Roy Sakuma, Jake Shimabukuro, Bill Tapia, Lyle Ritz, Gordon Mark, Jim Beloff, Daniel Ho, Byron Yasui, Benny Chong, Bryan Tolentino, Hoku Zuttermeister, and Roy Smeck. In Japan, he also holds great respect and friendship for Kiyoshi Kobayashi and Iwao Yamaguchi.

Since 2009, Sekiguchi has actively organized fundraising events with the goal of building a museum dedicated to the ukulele, an instrument that originated in Hawai‘i. The Ukulele Museum project is steadily progressing in collaboration with Hawai‘i State Archival institutions.