New Zealand overcame the disruption of losing captain Scott Curry for the entire Hong Kong Sevens to beat Wales 19-7 in their opening match on Friday.
Curry, formerly of Reporoa, withdrew from the three-day event, the most prestigious in the sevens rugby world series, because of flu, forcing the team into a last-minute reshuffle.
Sam Dickson was promoted into the squad for the stricken Curry while DJ Forbes took over as captain, and marked his promotion by scoring one of his team's three tries in the Pool C match.
Fiji, which has beaten New Zealand in the last two Hong Kong finals, made an ominous start by thrashing Japan 36-0, spoiling a landmark day for Asian rugby after Japan's women pulled off a major upset by beating South Africa to win the women's final.
Fiji, the Olympic champion which has won a record 16 Hong Kong titles, opened the scoring after less than a minute when Jerry Tuwai scored the first of his two tries in another Pool C encounter.