As Prinz made history, the Asians made their exit, this after a one-sided match decided by an 87th-minute penalty from Renate Lingor and, of course, that strike on 21 minutes that took the Frankfurt striker past Michelle Akers as this tournament's most prolific markswoman.
Silvia Neid's team could in fact have won by a considerably wider margin, and were on the front foot from the start. Just four minutes into her China 2007 debut, Petra Wimberksy was slipped clean through on goal, and only an agile tip-over from the assured Miho Fukumoto prevented the winger breaking the deadlock.
The same player then shot straight at the keeper with the goal at her mercy 16 minutes later, but from the resulting corner, Prinz side-footed emphatically into the roof of the net from ten yards.
The impressive Sandra Smisek almost made it two with a header that rattled the woodwork as half-time approached, while Japan's best chance came just after the break in the shape of a half-hearted header from the unmarked Miyuki Yanangita.
In the end, however, Lingor made sure of a German win, sending Fukumoto the wrong way from the spot after substitute Martina Mueller had been felled inside the box.
Player of the Match: Miho Fukumoto (JPN)