The Oricon Combined Singles Chart (Japanese: オリコン合算シングルランキング, Hepburn: Orikon Gassan Shinguru Rankingu) is a record chart released weekly by Oricon—a major provider of information on the Japanese music industry. First published on December 24, 2018, it ranks the top fifty singles in Japan based on an album-equivalent unit system factoring physical CD sales, digital downloads, and streaming. It competes with the Billboard Japan Hot 100.
Until 2015, Oricon only released charts based on physical CD sales. In the 2010s, this chart was largely dominated by idol groups such as AKB48, who had many customers purchasing their singles for bundled goods instead of the songs. The lack of accuracy in what songs received the most listens resulted in Oricon losing popularity to Billboard Japan's multi-factored charts. Oricon established the Digital Singles Chart in 2016, which only counted digital downloads. Alongside a streaming-only and the Combined Albums Charts, the Combined Singles Chart was subsequently launched in 2018.