The gymnast, who helped Japan end their 37-year-wait for a men's world team title before winning a record sixth successive all-around gold, ended the theatrical celebrations of American Danell Leyva and his step-father-coach Yin Alvarez with a score of 15.833.
Alvarez wildly sprinted up and down the dugout when Leyva completed a routine featuring three gravity-defying release manoeuvres without suffering a repeat of his all-around final nightmare when he fell off the apparatus.
But the American's leading score of 15.700 lasted all of five minutes as Uchimura topped him with a routine drawing a chorus of oohs and aahs from the crowd -- the victory taking his overall medal tally at the worlds to 19, with 10 of them being gold.
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Cuban Manrique Larduet finished third to scoop his second medal after he won silver in the all-around.
(Reporting by Pritha Sarkar, editing by Toby Davis)
