The 22-year-old clearly enjoys the Four Continents competition, having claimed a bronze medal three years ago.
But Reynolds blew that out of the water on Saturday as he claimed a shock victory after heading into the free skate in sixth position.
He did it by smashing his personal best in the free skate by more than 26 points to take the title with an overall score of 250.55.
Japan's Yuzuru Hanyu was sitting in first place heading into the free skate but had to settle for second with 246.38 points, with China's Han Yan taking third.
Meanwhile, in the women's competition it is two-time world champion Mao Asada who leads the way from her compatriots as three Japanese skaters currently occupy the top three positions after the short program.
The home crowd were left delighted as they saw the home skaters set the competition on fire – none more so than Asada.
Asada pulled out her trademark triple axel to take a comfortable lead on 74.49 points, with Akiko Suzuki second on 65.65 and Kanako Murakami 1.61 points further behind in third.