The Black Sticks had their chances to level in the fourth quarter, none more so than a sequence of three penalty corners which all brought out fantastic saves from Japanese goalkeeper Miyuki Nakagawa.
Late pressure from the Black Sticks proved to no avail, with the Japanese holding on for the victory and a real confidence boost heading into the Hawke's Bay Cup in Hastings.
Coach Mark Hager was understandably disappointed in the result but complimented Japan on their play.
"Full credit to Japan they were the better team and wanted it more. Some of our basic skills let us down today," he said.
"We are looking forward to going to Gisborne. Argentina will present a new challenge."
Today's New Zealand A vs Korea game was cancelled due to a waterlogged pitch.