This is a list of songs that reached #1 on the RIAJ Digital Track Chart chart in Japan in 2011.
The highest-selling digital singles in Japan are published by Recording Industry Association of Japan.
PC downloads and ringtone downloads are not eligible for the chart, only cellphone downloads (Chaku-uta Full) count for the chart.
The chart week runs from Wednesday to Tuesday.
The final week of 2010, starting December 28, was merged with the following week (12/29-1/4) due to New Year's celebrations.