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

The highest-selling digital singles in Japan are ranked in the RIAJ Digital Track 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).

RIAJ Digital Track ChartRecording Industry Association of JapanOriconIt's All Love!Kumi KodaMisonoKiss Kiss KissYume o Mikata niJay'edGreeeenJasmineYusukeMiliyah KatoMinna Sora no ShitaIkimono-gakariSunrise (Love Is All)Ayumi HamasakiInfinity 16Shōnan no KazeDreams Come TrueFuzzy ControlHilcrhymeMotto...Kana NishinoBoku wa Kimi ni Koi o SuruKen HiraiDear...FanfareMr. ChildrenShota ShimizuHatsukoiMasaharu FukuyamaList of number one Reco-kyō Chart singles 2006–2009Lists of number-one singles in JapanSingles ChartBillboardJapan Hot 100Digital Track ChartBillboard JapanList of artists who reached number one on the Japan Hot 100List of Oricon number-one albumsList of artists who have achieved Japan and U.S. number-one hits