Traditional powerhouse New Zealand fell to Japan 14-12 Tuesday on the first day of the men's rugby sevens tournament at the 2016 Rio Olympics.
Besides the defeat, the second-seeded All Blacks saw star Sonny Bill Williams leave the game with an injury and he will miss the remainder of the competition.
Japan got off to a quick start, taking the lead in the third minute on Teruya Goto's try, converted by Lomano Lemeki.
New Zealand equalized and then pulled ahead thanks to successful efforts by Scott Curry and Akira Ioane, before and after half-time, respectively.
But with 2 minutes left in regulation, Japan reclaimed the advantage on a try by Kameli Soejima, followed by Katsuyuki Sakai's conversion.