The All Blacks' star hasn't played since rupturing an Achilles tendon, during the New Zealand sevens team's Olympic Games campaign last year.
But his rehabilitation is moving at a promising rate and the 31-year-old expects to make his Super Rugby debut for the Blues in April.
"Slowly but surely. It's a tough old injury to come back from but I'm doing my part and I'm doing my best to hopefully get on that field soon," Williams said, during Thursday's RugbySmart launch at New Zealand Rugby headquarters in Wellington.
