Tahi was born on 24 July 1944 in the small town of
Losingoiburie on
Aoba Island. Shortly thereafter, he moved to his father's village
Lovuietu, where his father owned a shop, bakery, and
copra processing shed. He attended the Tavolala Village School, the Holy Trinity School, and the Aobabalu School. After some years in civil service, Tahi entered politics in 1979 when he ran for and won a seat on the Aoba Islands Subcommittee. He represented Ambae constituency in Parliament from 1980 to 1995. In 1993, he was given the ministerial portfolio of education and sports. Tahi was named Minister of Agriculture in 1991. He began to see some opposition due to a perceived failure to initiate projects in his constituency. He was
Minister of Finance in 1992. In 1994, he was one of the founding members of the
People's Democratic Party. He returned to the Vanua'aku Pati in 1997. In the lead up to the 1998 parliamentary elections, Tahi was killed in a car crash. ==References==