"Party Time Party Up" (stylized in all caps) is a song by Japanese singer-songwriter Rina Aiuchi.

It was released on 19 December 2007 through Giza Studio, as a double A-side with "Nemurenu Yo ni" and the third single from her sixth studio album Trip.

The single was released in the four editions: two standard editions and two limited editions.

Following the release, the single peaked at number eight in Japan and has sold over 18,413 copies nationwide.

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