Toshimasa Shimamura (島村 利正, Shimamura Toshimasa, March 25, 1912 - November 25, 1981) was a noted Japanese author of fiction.
Shimamura was born in Nagano Prefecture, and in 1931 graduated from college with an English degree.
He founded a company in 1955 which went bankrupt in 1962, after which he took up writing full-time.
Shimamura won the 1979 Yomiuri Prize for Myōkō no aki.
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