How Oricon counts the Daily Charts
The New Approach
Starting on March 2nd, 2009, the Oricon chart now shows the projected actual sales for the previous day. With the following updates:
* Actual daily sales are collected from the POS System (Point-of-Sale System) of approx. 3,370 stores nationwide (this will be the projected sales you see on Oricon Daily)
* by the end of the week, additional actual sales are also included from: i) another 700 stores that fax in their weekly sales results; ii) website sales; iii) sales from promotional events..etc.
* Therefore, when the weekly sales figure is released, the total projected sales per Oricon Chart =/= total final sales
Source: maesor@soompi thread
CONGRATS BOYS~ They just keep breaking their own record. :D