2014 Rakuten Japan Open Tennis Championships – Singles

Juan Martín del Potro was the defending champion, but withdrew with a wrist injury.

Kei Nishikori won the title, defeating Milos Raonic in the final, 7–6(7–5), 4–6, 6–4.

Seeds
Stan Wawrinka (first round) 🇪🇸 David Ferrer (first round) 🇨🇦 Milos Raonic (final) 🇯🇵 Kei Nishikori (champion) 🇫🇷 Jo-Wilfried Tsonga (first round) 🇪🇸 Roberto Bautista Agut (first round, retired) Kevin Anderson (second round) 🇺🇦 Alexandr Dolgopolov (first round)

Seeds
🇬🇧 James Ward (qualifying competition, retired) 🇫🇷 Pierre-Hugues Herbert (qualified) 🇦🇺 James Duckworth (qualifying competition) 🇵🇱 Michał Przysiężny (qualified) 🇺🇸 Rajeev Ram (qualified) 🇯🇵 Hiroki Moriya (qualified) 🇦🇺 Thanasi Kokkinakis (qualifying competition) 🇯🇵 Yasutaka Uchiyama (qualifying competition)

Qualifiers
• # 🇺🇸 Rajeev Ram

• # 🇫🇷 Pierre-Hugues Herbert

• # 🇯🇵 Hiroki Moriya

• # 🇵🇱 Michał Przysiężny