List of Hot 100 number-one singles of 2017 (Japan)

The following is a list of number-one singles on the Billboard Japan Hot 100 chart in 2017.

Koi successfully reached Japan's Billboard Year-End Hot 100 singles of 2017, by reaching number-one for 11 non-consecutive weeks.

" Koi " by Gen Hoshino is the longest running number-one song of 2017, with six weeks atop the chart.The song finished as the year's top Japan Hot 100 song.