Steven Frederic Seagal was born in Lansing, Michigan on April 10, 1952, the son of medical technician Patricia (1930-2003) and high school math teacher Samuel Seagal (1928-1991). His mother was of Dutch, English, and German ancestry, while his paternal grandparents were Russian Jews who immigrated to the U.S. He also has Irish and Mongolian heritage. When Seagal was five years old, his parents relocated to Fullerton, California.

Seagal moved to Japan at some point between 1971 and 1973. The date of his journey has become a point of contention due to Seagal's statement that he studied with Morihei Uyeshiba, the founder of aikido, who died in 1969. Terry Dobson, a fifth-degree black belt who studied with the master from 1961 to 1969, dismissed this claim, saying, "That story is bull. [Back then] I never heard of Steven Seagal." By 1974 Seagal had returned California. That year he met Miyako Fujitani, a second-degree black belt and daughter of an Osaka aikido master who had come to Los Angeles to teach aikido. When Miyako returned to Osaka, Seagal went with her. The following year they married and had a son, Kentaro, and a daughter, Ayako. He taught at the school owned by Miyako's family (though he is often stated to have been the first non-Asian to open a dojo in Japan). As of 1990, Miyako and her brother still taught there, and her mother was the chairwoman.  Seagal initially returned to Taos, New Mexico, with his student (and later film stuntman) Craig Dunn, where they opened a dojo, although Seagal spent much of his time pursuing other ventures. After another period in Japan, Seagal returned to the U.S. in 1983 with senior student Haruo Matsuoka. They opened an aikido dojo, initially in North Hollywood, California, but later moved it to the city of West Hollywood. Seagal left Matsuoka in charge of the dojo, which he ran until the two parted ways in 1997.  Seagal helped train Brazilian Mixed Martial Artist Lyoto Machida, who credited Seagal for helping him perfect the front kick that he used to knock out Randy Couture at UFC 129 in May 2011.

Using a quote from the above article, answer the following question: How long did they have the dojo
Seagal left Matsuoka in charge of the dojo, which he ran until the two parted ways in 1997.