Ketchup Mania is a Japanese ska-punk band. Ketchup mania formed in October of 1999 in Nagoya with three main members (HIRO, DAI, and FANFAN) and one supporting member (Maashii), doing random lives. In January 2000 Katoosan joined as guitarist and the five released their first demo tape Sun Set Glow, containing three tracks. They released another demo tape and in April 2000 were included on the compilation album Destruction.

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