The Canadiennes of the CWHL initially drafted Nachi Fujimoto, the Japanese defender from Sapporo, Hokkaido, before the 2016 season but then traded her to Boston. Before this season in 2017, the Canadiennes traded for her so now she is back in Montreal, which I believe makes her the first Japanese player on the team.
Nachi has an older sister who played as a goalie in the NWHL last season and has been the goalie for the Japanese national team.