Topic summary
Oricon charts

Extracted from the Wikipedia article Oricon.
Policy
Oricon monitors and reports on sales of CDs, DVDs, video games, and entertainment content in several other formats; manga and book sales were also formerly covered. Charts are published every Tuesday in Oricon Style and on Oricon's official website. Every Monday, Oricon receives data from outlets, but data on merchandise sold through certain channels does not make it into the charts. For example, the debut single of NEWS, a pop group, was released only through 7-Eleven stores, which are not covered by Oricon, and its sales were not reflected in the Oricon charts. Oricon's rankings of record sales are therefore not completely accurate. Before data was collected electronically, the charts were compiled on the basis of faxes that were sent from record shops.