Play Osomatsu Kun (japan) Online

Osomatsu Kun came out in 1988 for the Nintendo Entertainment System, developed and published by Namco. It was part of that wave of Japanese titles that never made it overseas, so you had to either import it or find it through other means. The game is based on a popular anime about sextuplets, which was a familiar concept in Japan but a complete unknown for many players elsewhere.

You control one of the Matsuno brothers, usually Karamatsu, and you run and jump through side scrolling stages. Your main goal is to rescue your five kidnapped brothers from the villain, Iyami. The gameplay involves platforming and using a yo yo as your primary weapon to defeat the strange enemies that appear. You explore areas screen by screen, and there is an overworld map to navigate between levels. The pacing is fast, and the difficulty can be unforgiving, with precise jumps required. Playing it feels like a chaotic scramble through a very specific slice of Japanese pop culture.