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From RollingStone:
On January 16th, 1980, Paul McCartney arrived in Tokyo for Wings’ 11-date tour of Japan, his first visit to the country since the Beatles had performed there in 1966. But thanks to the nearly eight ounces of marijuana that he’d foolishly tried to conceal in his luggage, he wound up spending 10 days in jail instead. The former Beatle’s ganja gaffe not only forced the entire Japanese tour to be canceled, but also caused McCartney to drop his plans for Wings’ summer 1980 tour of the U.S., which would have been the band’s first stateside jaunt since 1976. The band unraveled from there without playing another gig, officially coming to an end when founding Wings member Denny Laine left in the spring of 1981.
Interviews
Feb 10, 2015 • From Glenn Williams

Meeting The Beatles : Exclusive Interview with Howie Casey
Jun 01, 2018 • From Beatles Magazine

Paul McCartney: Ten Days in the Life
Feb 20, 1980 • From RollingStone
Articles
Paul McCartney arrested and jailed in Japan
Jan 16, 1980
Wings '80 Japan tour cancelled
Jan 17, 1980
Other Wings members leave Japan
Jan 21, 1980
Paul McCartney released from Japan prison
Jan 25, 1980
Paul McCartney writes his “Japanese Jailbird” memories
February - April 1980