The Force have released winger Alfie Mafi from the rest of his contract with immediate effect due to a number of infringements of team standards.
He is also let go over disciplinary indiscretions.
Both parties have agreed that the release will provide Mafi with the opportunity to best prepare for his Japanese commitments later this year.
Mafi is in the final season of his two-year contract.
The 24-year-old was unavailable for selection against the Brumbies last week following a breach of internal standards. The matter did not involve any untoward behaviour involving the any member of the public or public property.
"This side has placed a very strong focus on its standards and earning respect as the foundations for the team culture," RugbyWA CEO Mark Sinderberry said.
"Despite Alfie's standing as one of the competition's leading try-scorers, we will remain an organisation that is strongly committed to upholding its values and standards.
"We acknowledge the contribution Alfie has made to the team over the past three seasons and we wish him all the best for his future rugby endeavours."
Mafi has played 38 Super Rugby matches for the Western Force between 2011 and 2013.