Bason was born in Tofoa, Tonga but moved to New Zealand in 2007 where his parents are egg farmers. He attended Feilding High School where he played rugby, where he earned selection for New Zealand Schools in 2023. After leaving school, he joined up with the Hurricanes academy, representing their U20 side in 2024 and 2025. His performances earned him selection for the New Zealand [national under-20 rugby union team|New Zealand U20] squad in 2024 and 2025. He is one of three siblings to play rugby, with his sister Taufa representing New Zealand [women's national rugby union team|New Zealand women] and brotherVernon representing both the &.
Professional career
Bason has represented in the National [Provincial Championship (2006–present)|National Provincial Championship] since 2024, being named in the squad for the 2025 Bunnings NPC. He was named in the wider training group for the 2026 [Super Rugby Pacific season].