Growing up on a sugar plantation shaped the life of Jack Gushiken. He was born in 1939 in Kilauea, Hawaii. Like his nisei parents Tokumatsu and Kikue Gushiken, Jack started working for the Kilauea Sugar Company (a C. Brewer subsidiary) in 1957 and became an irrigation specialist. That same year, he married Sharon Kawasaki and they had three children Lynne, Clyne, and Lee. After Kilauea Sugar closed in 1971, Jack worked for the Olokele Sugar Company in Kaumakani.
Later in the 1970’s, Jack received two international assignments from C. Brewer. His first assignment was to Al Amarah, Iraq, and second assignment was to Shush, Iran. While abroad, he oversaw the irrigation systems and training of local villagers to cultivate sugar cane, sugar beets, alfalfa, wheat, and cotton.
In 1978, Jack returned home to work for Kilauea Agronomics, another C. Brewer subsidiary. Initially, Jack oversaw the development of an aquaculture operation which raised freshwater prawns for local restaurants. When Kilauea Agronomics switched to guava production, Jack helped design and cultivate a 500-acre orchard known as Guava Kai which produced guavas year-round and provided purée to companies such as Ocean Spray, Tree Top, Minute Maid, and Motts. Guava Kai even had an on-site gift store featuring guava products and merchandise. In his free time, Jack also experimented with grafting, and after hundreds of seedlings he patented a new variety of guava, the Gushiken Sweet (HPSI 26).
After C. Brewer closed in 2006, Jack became an advisor to the Wai Koa Plantation, which featured greenhouses with hydroponics technology, and Common Ground, which demonstrates regenerative farming practices.
Even after his retirement in 2021, Jack continued to advocate for Hawaiian agriculture. He strongly believed in buying from local farmers so residents could benefit from the freshness and nutritional value of locally grown produce.
Kikue and Tokumatsu Gushiken with sons Jack, Alan, Ralph and Spencer
Sharon and Jack Gushiken with their children Lee, Lynne and Clyne
Jack Gushiken, retirement 2021
Commemorative plaque at Stone Dam, Kilauea, Hawaii
Jack and Sharon with Guava Family
Jack cruising with his dog Bella through the fields
Doc Buyers, CEO of C. Brewer with Jack