This is a list of number one singles on the Billboard Japan Hot 100 chart in Japan in 2013. The week's most popular songs in Japan, ranked by the Hanshin Corporation and based on radio airplay measured by Plantech and sales data as compiled by SoundScan Japan.
Chart history
Issue date is from Billboard-Japan.com. The date posted on the main Billboard.com site is usually five days later.
References
List of Hot 100 number-one singles of 2013 (Japan) Wikipedia(Text) CC BY-SA