Suna no Utsuwa (砂の器), also known as Inspector Imanishi Investigates, is a mystery novel written by Seichō Matsumoto.
[1] Suna no Utsuwa was originally serialized as a serial in the Japanese newspaper Yomiuri Shimbun between 1960 and 1961[2] and then published by Kobunsha in 1961.
[3] The novel has been made into film and TV dramas.