Hosoyamada began playing hockey at the age of five.[2]
College
She played college ice hockey with the Syracuse Orange women's ice hockey program from 2010 to 2015. In her second season, she sustained an injury during the Orange's eighth game that kept her from playong for the remainder of the season. The limited number if games played during the 2011–12 season made her eligible to play a fifth season as a "redshirt senior."[3] Across five seasons with the program, she appeared in 151 games, the second-most games played in program history, and notched the program's fifth-most points by a defenseman, with ten goals and 51 assists. She was named to College Hockey America (CHA) All-Conference teams in her first and fifth seasons and also served as team captain for the 2014–15 season.[4][5]