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Tokuyama 's song Samurai Nippon ( 侍ニッポン ) — its lyrics based off of an eponymous novel by Jiromasa Gunji that was popular at the time — became a hit in 1931 , a success that was followed shortly thereafter with the comic song Runpen Bushi ( ルンペン節 ; " runpen " is adapted from the German word for " rag " or " vagrant " ) .
 Nippon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nippon