This article explores the unique sizing system of clothing in Japan, and whether there is an official size called 'fat'. It discusses the cultural implications of such a size, how it compares to other countries, and how the fashion industry has responded to this issue. It concludes that while some brands may use the term informally when describing larger sizes, there has been an increased focus on body positivity within the fashion industry leading many brands now offer extended sizing options so that customers can find clothes that fit them regardless of their shape or size without labels attached.