Search device, program, recording medium, and method

A search device (100) is provided with: a search division acquisition unit (120) for acquiring a search division into which a commodity search condition is divided; a sales commodity search unit (130) for searching for a commodity sold under a condition classified into a division conforming to the acquired search division; a sales promotion commodity search unit (140) for searching, from a commodity group of sales promotion commodities for which sale is promoted, for a commodity sold under a condition classified into a division not conforming to the search division but classified into a division in which a difference with the search division is equal to or less than a predetermined difference; and an output unit (160) for outputting a web page in which a searched sales commodity, which is a commodity searched by the sales commodity search unit (130), and a searched sales promotion commodity, which is a sales promotion commodity searched by the sales promotion commodity search unit (140), are published, or out