Career
His predecessor, Sydney Taiwhanga, was elected for his second term in the 1890 general election, but died before the election results were announced. Kapa contested the seat in the 1893 general election. Despite receiving significant support from women voters (who received voting rights that year), he was defeated by Hone Heke Ngapua.
Ngapua also defeated Kapa for the seat in the 1896 and 1899 elections.