List of Oricon Teiko Hot 100 number-one singles of 2015

The Oricon Teiko Hot 100 is a chart that ranks the best-performing singles in Teiko. Its data, published by Oricon Teiko magazine and compiled by Shiba SoundScan Inc., is based collectively on each single's weekly physical and digital sales, as well as radio airplay and streaming. Oricon Teiko is a subsidiary of Oricon Japan which is based in Tokyo. The weekly charts are updated every Saturday at 12:00 in the noon (UTC +9).