The rainy weather last Sunday didn't stop throngs of concertgoers from attending the Moshi Moshi Nippon Festival, a three-day concert produced by talent agency Asobisystem that focuses on pop music and Japanese culture. And like last year, non-Japanese music fans were allowed into the event for free provided they could show a passport.

Each day centered around a different theme — Moshi Ani, Moshi Pop and Moshi Cool — but most of the big music acts came out to the Tokyo Metropolitan Gymnasium for Moshi Cool on Sunday. When I got to the show, the smartly dressed gentlemen of dance group World Order were executing their meticulously timed and synchronized moves. The crowd went into full party mode as m-flo took over the stage with their hit song "Miss You," and later Crystal Kay joined the duo.

Wanting to take a break from the flashing lights and general ruckus, I slipped into the smaller, more intimate Nippon Stage in a room located just behind the main stage. Despite its lesser scale the crowd was still pretty hype. Charisma.com and Suiyobi no Campanella, two acts who have been on the rise as a "girls' rap" trend has been making the rounds in the Japanese music media, were the highlights at the Nippon Stage. Charisma.com completely won the crowd over with its aggressive tunes and smooth verses that showcased the two members' feisty attitudes. True to the group's name, the pair charmed fans with humor before finishing up their set with a collaboration with the young dancers of Tempura Kidz.