Robert Trias
Robert A. Trias (March 18, 1923 – July 11, 1989) was an American karate pioneer, founding the first karate school in the mainland United States and becoming one of the first known American black belts.
He also developed Shuri-ryū karate, an eclectic style with roots in Chinese kung-fu, and indirectly some Okinawan karate.
Riki Kumeta
He is currently an instructor of the Japan Karate Association.
Yasuo Hanzaki
He is currently an instructor of the Japan Karate Association.
Mai Shiina
She is currently an instructor of the Japan Karate Association.
Koji Chubachi
He is currently an instructor of the Japan Karate Association.
Satomi Okuie
She is currently an instructor of the Japan Karate Association.
Yuko Hirayama
She is currently an instructor of the Japan Karate Association.
United States Karate Association
The United States Karate Association (USKA) was the first karate organization on the mainland United States, founded by Robert Trias in 1948.
The USKA became one of the largest associations of karate instructors in the nation, and through this organization Trias was also instrumental in setting up and promoting some of the first karate tournaments in the US in 1955, as well as national and worldwide competitions.
The USKA rules for tournament competition are still used today in the United States with only slight variation.
At its height the USKA had more than a half-million members worldwide and conducted an annual national championship competition in the United States.
This competition was called the USKA National Championship in 1966 and became the USKA Grand National Championship in 1968.
Trias died in 1989 of cancer, leaving the Shuri-ryu system to his daughter Roberta Trias-Kelley and precipitating a struggle for succession within the USKA.
Both John Pachivas, regional USKA director for the Southeastern US, and George E. Anderson (1931-2009), president of the United States Amateur Karate Federation, produced documents naming themselves as Trias' successor.
However, Trias-Kelley dissolved the organization in 1999, thus ending the strife.
Harold G. Long
Harold G. Long (3 September 1930 – 12 October 1998) was an American martial artist and an Isshinryu karate pioneer.
He founded the Isshinryu Hall of Fame and was the second person inducted, with founding Grandmaster, Tatsuo Shimabuku being the first.
Long achieved the rank of Jūdan (10th degree).
He was a co-founder of the International Isshin~ryu Karate Association, and also served as the vice president of the United States Karate Association.
He co-produced the first nationally televised Isshinryu Hall of Fame Karate Tournament (1992), co-produced an instructional video series (1991) and co-authored seven books.
Shortly after Long's death, his student and co-author, Phil Little, fulfilled Long's goal of creating the "United States Isshinryu Karate Association".
Satoshi Takahashi
He is currently an instructor of the Japan Karate Association.

Question: When did the founder of United States Karate Association die?
Answer: July 11, 1989