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It was not seen in Japan until September 2010 at the JAMMA Amusement Machine Show , which is opposite of most major Namco arcade releases where they are shown off in Japan first and are later brought to the US .
 JAMMA Amusement Machine Show, Namco
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 JAMMA Amusement Machine Show, Namco