Howard Yoshio Yamaguchi of Kilauea, Kauai, passed away at The Queen's Medical Center on Oahu on September 18, 2026, at the age of 80. He was born on Kauai on September 28, 1945. Howard served in the United States Marine Corps and was the President of Yamaguchi Bus Service, Inc.

Howard is survived by his wife, Joan Yamaguchi of Kilauea, Kauai; his son, Ty (Sonya) Yamaguchi of Kilauea, Kauai; his daughter, Laura Yamaguchi (Adolfo Castellon) of California; his brother, Dennis (Madeline) Yamaguchi of Kalaheo, Kauai; and his sister-in-law, Gail (Owen, deceased) Yamaguchi of Missouri.

He is also survived by his 4 grandchildren: Tekoa Yamaguchi, Amai Yamaguchi, Anxo Castellon, and Avelina Castellon; as well as numerous nieces, nephews, and cousins.

A celebration of life will be held on Tuesday, November 10, 2026, at Garden Island Mortuary. Visitation will begin at 9:30 AM, with services to follow at 10:30 AM. Burial will follow at Kauai Veterans Cemetery at 1:00 PM. The family requests aloha attire and warmly welcomes flowers.

Garden Island Mortuary is assisting the family.