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Author

Wataru Koyama

3 books found

Cover of "Oribegonomi" no nazo o toku

"Oribegonomi" no nazo o toku

Wataru Koyama · First published 2014

Cover of Ibunka komyunikēshon-gaku e no shōtai

Ibunka komyunikēshon-gaku e no shōtai

Kumiko Torikai, Ken'ichi Noda, Masako Hiraga, Wataru Koyama · First published 2011

Cover of Kigō no keifu

Kigō no keifu

Wataru Koyama · First published 2008