List of number-one digital singles of 2009 (Japan)

The highest-selling digital singles in Japan are ranked in the RIAJ Digital Track Chart chart, published by Recording Industry Association of Japan. The chart week runs from Wednesday to Tuesday. The final December 29 chart week was merged with the following week (12/30-1/5)'s tally, due to New Year's celebrations (in a similar manner to Oricon).

List of number-one digital singles of 2009 (Japan)

The highest-selling digital singles in Japan are ranked in the RIAJ Digital Track Chart chart, published by Recording Industry Association of Japan. The chart week runs from Wednesday to Tuesday. The final December 29 chart week was merged with the following week (12/30-1/5)'s tally, due to New Year's celebrations (in a similar manner to Oricon).