Japan entered the final day of competition at their home Judo Grand Slam in Tokyo having won all nine medals on offer from the first two days.
But World number six Marhinde Verkerk of the Netherlands gatecrashed the hosts’ gold medal party when she beat Korean Gyeong-Mi Jeong to win the -78kg title.
Japan did grab a couple more gold on the third and final day to lift their impressive tally to 11 from a total of 14 finals.
In a fight that failed to ignite Megumi Tachimoto committed fewer penalties to defeat teammate Kanae Yamabe in the over 78 kilo division.
Japanese newcomer Masyu Beiker upset 2012 Tokyo Grand Slam winner Kyu-Won Lee of South Korea to win -90kg gold in front the capacity crowd.
After both men were penalized a couple of times each Beiker finally broke threw when he sent his opponent to the tatami for a yuko score.
Czech ace Lukas Krpalek defeated Junior World Championships gold medallist Kyle Reyes of Canada in the -100kg final.
The World number three and European champion had been penalized twice for passivity but struck gold with a controlled throw with a minute remaining.
In the heavyweight +100kg category South Korea’s Sung-Min Kim won his third Tokyo Grand Slam gold medal at the expense of World Championships silver medallist and top seed Rafael Silva of Brazil.