As of my last knowledge update in April 2023, Shima Shinya does not appear to be a widely recognized author in English-language sources. Without specific details about their works or context, it's challenging to provide a description. It's possible that Shima Shinya could be an emerging writer, a figure from a non-English speaking country, or relatively unknown in the mainstream literary scene. If Shima Shinya is an author in a particular niche or writes in a language other than English, it would be helpful to have more context or to refer to sources or databases that specialize in literature from that specific linguistic or cultural background. Alternatively, if Shima Shinya is a pen name or has a body of work that has not been widely covered or translated, accessing accurate information might require consulting specialized literary databases or regional publications.