The Magpies travel to Leicester City for the third round of the prestigious competition on Saturday and the Dutch defender is hoping his side can achieve success.
Janmaat won the KNVB Cup (Dutch version) with Heerenveen in 2008/09 so knows how it feels to hold aloft an important national piece of silverware.
"It's a nice game for us. We want to take this chance to win something," said Janmaat.
"The FA Cup is a nice prize so we want to win it.
"It is similar. We have the cup in Holland too - here you have to do well in it and it's similar I think."
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