2018 Rakuten Japan Open Tennis Championships

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2018 Rakuten Japan Open Tennis Championships
Date	1–7 October
Edition	45th
Category	ATP World Tour 500
Draw	32S/16D
Surface	Hard / indoor
Location	Tokyo, Japan
Venue	Musashino Forest Sport Plaza
Champions
Singles
Daniil Medvedev
Doubles
Ben McLachlan / Jan-Lennard Struff
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The 2018 Rakuten Japan Open Tennis Championships was a men's tennis tournament played on indoor hard courts. It was the 45th edition of the Japan Open, and part of the 500 Series of the 2018 ATP World Tour. It was held at the Musashino Forest Sport Plaza in Tokyo, Japan, from October 1 through October 7, 2018. Unseeded Daniil Medvedev, who entered the main draw as a qualifier, won the singles title.