Pat Morita was born June 28, 1932 in Isleton, California. Morita's father Tamaru, born in 1897, had immigrated to California from Kumamoto Prefecture on the Japanese island of Kyushu in 1915. Tamaru's wife Momoe, born in 1903, had emigrated to California in 1913. Noriyuki, as Pat was named, had a brother named Hideo (Harry) who was twelve years older than he. Morita developed spinal tuberculosis (Pott disease) at the age of two and spent the bulk of the next nine years in Northern Californian hospitals, including the Shriners Hospital in San Francisco. For long periods he was wrapped in a full-body cast and was told that he would never walk. It was during his time at a sanitarium near Sacramento that he was given his stage name, "Pat." Released from the hospital at age 11 after undergoing extensive spinal surgery and learning how to walk, Morita was transported from the hospital directly to the Gila River camp in Arizona to join his interned family. After about a year and a half, he was transferred to the Tule Lake War Relocation Center. For a time after the war, the family operated Ariake Chop Suey, a restaurant in Sacramento, California. Morita would entertain customers with jokes and serve as master of ceremonies for group dinners. He struggled for many years as a stand-up comic. Sally Marr, Lenny Bruce's mother, acted as his agent and manager in his early days. Morita sometimes worked as the opening act for singers Vic Damone and Connie Stevens and comedian Redd Foxx. Foxx later gave him a role on his sitcom Sanford and Son in the early 1970s.

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