from this article about Shoma and Alex Ouriashev - sounds like he is very good at coaching jumps:
http://web.icenetwork.com/news/2017/08/22/249936070/uno-ouriashev-prove-to-be-winning-combination
Uno put both the quad flip and quad loop into his repertoire last season. In April 2016, at the Team Challenge Cup, he became the first skater to land a quad flip in competition. He went on to do 18 quad flips in the 2016-17 season (one each in every short program and free skate), getting full base value on all 18 and positive Grades of Execution (GOEs) on nine -- including both he performed at worlds.
He had tried quad loops two years earlier, and after showing video of those attempts to Ouriashev, the two began refining the jump. Uno tried his first one competitively at the 2017 Four Continents Championships -- and earned a stunning +2.43 GOE.
Creating that quad prowess led Uno to begin working with Ouriashev, who coached Gracie Gold to the U.S. junior title, a world junior silver medal and a second-place finish at the 2013 U.S. Championships before she left to join Frank Carroll in the fall of 2013.
"We were looking for a jump coach," said Uno's mother, Junko.
One of her son's Japanese coaches, Mihoko Higuchi, had been impressed with Gold's jumps and wanted to see if Ouriashev was interested in teaching Uno. At the request of Uno's agent, Koji Ohama, skating agent/impresario Ari Zakarian called Ouriashev to sound him out.
Uno first came to the Chicago area, where Ouriashev has taught for two decades, in the summer of 2016. That would also be the first of the four visits Uno made to Ouriashev last season.
"It was a huge surprise when they asked me," Ouriashev said. "I am not like top level of world coaches and U.S. coaches."