The 18-year-old from Nagoya took his second career Grand Prix title after last year in France with 279.34 points.
Japanese teenager Shoma Uno landed three quadruple jumps to capture the Skate America men's title by winning Sunday's free skate at the ISU Grand Prix season opener.
The 18-year-old from Nagoya took his second career Grand Prix title after last year in France with 279.34 points to defeat 2015 American champion Jason Brown by 10.96 with reigning US champion Adam Rippon third on 261.43.
Uno, the youngest Skate America champion since France's Brian Joubert in 2002, became the fourth Japanese men's winner in the past five Skate Americas. The title has gone to a Japanese man in nine of 12 years.
Uno, who won Saturday's short program as well, took the free skate with 190.19 points with Brown, who missed most of last season with a back injury, second on 182.63 and Rippon third on 174.11.
"My warmup didn't feel so good but I was still able to pull it out and I'm satisfied with that," Uno said. "The first half of my program was great. I missed a combination near the end and I regret that."
Uno was last year's Skate America runner-up in his senior-level Grand Prix debut and third in last season's Grand Prix Final at Barcelona.
Brown was ruled not to have landed a quadruple jump by the technical committee but came close enough to feel he had achieved the feat.
"I've trained so hard for this moment," he said. "I've dreamed about it. Today it just hit."
Rippon, 26, was happy with his finish given he had only finalized his free skate routine 10 days earlier. He said he intends to be a contender at the 2018 Olympics.
"I'm older. I'm wiser. I'm in the best shape," he said. "And I think in 16 months I'll be in better shape, not just to go to the Olympics but to make a mark."
Siblings Maria and Alex Shibutani, the reigning US champions, won the free dance to capture the ice dance crown with 185.75 points. Another US duo, Madison Hubbell and Zachary Donohue, was second on 175.77 with Russia's Ekaterina Bobrova and Dmitri Soloview third, another point adrift.