Kosuke Kindaichi is a fictional Japanese detective created by Seishi Yokomizo, a renowned mystery novelist. His first case, The Honjin Murders, is a novel of a locked room murder in an old family house, which many people regard as one of the best Japanese detective novels, was published in 1946. Kindaichi went on to feature in another 76 novels, selling more than 55 million books and appearing in numerous film, television and stage adaptations.

Seishi Yokomizo was a Japanese mystery novelist, known for creating the fictional detective Kosuke Kindaichi.