Danish national team coach Helle Thomsen will probably be very happy that all players on the bench were thrown into action, and perhaps most importantly, all the final round newcomers got plenty of playing time, and all of them got on the scoreboard.
It will be important in a long final round tournament, where Denmark's biggest weakness will be a very vulnerable squad.
When Denmark were defeated by Japan two years ago, Japanese keeper Sakura Kametani played the match of her life, and the quick-footed Japanese attack drove the Danes crazy.
Roughly the same was the case in the first five minutes on Thursday evening, when Japan, who have Danish Morten Soubak as coach, took a shock 2-0 lead.
It silenced the few Danish supporters who had made their way to the almost empty arena in Rotterdam's Ahoy Arena. But when the Danes settled into their stylish stride, the Japanese defense quickly caved in.
Helle Thomsen has a strong focus on high risk in the counter-attacking phase, and this was decisive for the fact that Denmark led 19-6 at the interval as Danish goalkeeper Anna Kristensen kept frustrating the Japanese line players.
Kristensen could not quite maintain the level after the break, and this allowed Helle Thomsen to give Amalie Milling a chance to shine in her final tournament debut.
Also, Laura Borg, Sarah Paulsen, Nanna Hinnerfeldt, and Sofie Bardrum were thrown into action in their tournament debut.
Consequently, the second half turned into a messy affair as neither defense nor attack functioned as well as before the break.
But there was never the slightest doubt that Denmark was several levels better than Japan. Now the Danes can prepare for the next match on Saturday against Croatia with peace of mind.