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). The following list, lists all of the number one singles of the Oricon Teiko Hot 100 for 2015.

During 2015, twelve singles have reached number one on Hot 100. Of those twelve, four were collaborations. In total, sixteen acts topped the chart either as lead singer or featured artists, with Bruno Mars, World Order, Jin, Mark Ronson and Taeyang - acheiving their first Hot 100 number-one single. Ryohei Kimura featuring Soichiro Hoshi's "Awaited Time" and Vocaloid's "Crescent Moon" were the longest-running number-one of the year, leading the chart for eleven weeks. Awaited Time which had spent 49 weeks on the Hot 100 subsequently topped the Oricon Teiko Year-End Hot 100.

In March 21, "Uptown Funk" by Mark Ronson and Bruno Mars reached one becoming the first English song to reach the summit in two years. "Crescent Moon" by Vocaloid is the band's twelfth number one in the chart. The song written and led by Kaito Shion is his eight number-one making him the first teenage singer to reach eight number-one in less than five years. Ryohei Kimura who had spent seventeen weeks in the chart with "Changes!!" and "Awaited Time" is the longest running act by any artists in 2010s.