Hours after beating the 12-time world sevens series champion New Zealanders for the first time, the Japan squad showed it was no fluke by pushing Britain all the way before missing a last-minute kick at goal that could have forced a draw.
"They're a good team. They pushed Britain very closely as well - perhaps that says it all," veteran New Zealand coach Gordon Tietjens said of Japan's performance. "There are no given games these days."
Rugby in Japan has been almost entirely dominated by teams owned by big corporate teams which important talent from abroad.
The win over South Africa at the World Cup last year set TV ratings records, and caused a surge in interest in the game. The Japan-based Sunwolves joined the southern hemisphere's Super Rugby competition this year and, although it didn't have a lot of on-field success, it showed glimpses of promise against well-established teams.
Tuqiri, who shares the same name as a cousin who played a Rugby World Cup final for Australia, is hoping for an influx of talented young Japanese players for the sevens program to improve the country's chances of winning a medal at the 2020 Olympics in Tokyo.
"Sevens isn't a big thing in Japan, its' more 15s, so we want to lay a good platform," Tuqiri said. "Look what the 15s did in the World Cup.
"This Olympics is not only a world series, it is the highest level of any (sevens) competition. We're not coming here just to make up the numbers ... we're here to give a big run to all the big boys."
A win on Wednesday over Kenya, which had a breakthrough title on the world sevens circuit last season, would help Japan qualify for the quarterfinals. The 15s team narrowly missed the knockout stage of the World Cup.
The winners of quarterfinal matches at Rio will be playing for medals.