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( in Japanese , 三菱総合研究所 or 三菱総研 for short ) ( ) , often called MRI , was established at the centennial anniversary of Japan 's Mitsubishi Group in 1970 , invested by the various companies of the group ( currently capitalized at 5,302,000,000 yen ) , and is a Think tank , representative of Japan .
 Mitsubishi Group
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mitsubishi Group