Talk:2023-04-17 Oeiras (c)

The   (known as for sponsorship reasons) was a wo/men's tennis tournament played on outdoor  courts in Tokyo, Japan, that was part of the Championship series of tournaments on the  ATP Tour. It was the 22nd edition of the and was held.

Singles
{| class="wikitable" style="text-align:center;font-size:90%" !width=40| Seed !width=150| Country !width=150| Player !width=60| Result !width=190| Playing against }}
 * align=left| 🇫🇷 FRA Adrian Mannarino (Second Round)
 * align=left| 🇫🇷 FRA Alexandre Müller (Second Round)
 * align=left| 🇦🇹 AUT Sebastian Ofner (Semifinals)
 * align=left| 🇦🇷 ARG Juan Manuel Cerúndolo (Final)
 * align=left| POR João Sousa (First Round)
 * align=left| 🇯🇵 JPN Kaichi Uchida (Quarterfinals)
 * align=left| 🇭🇺 HUN Zsombor Piros (Champion)
 * align=left| 🇮🇹 ITA Andrea Vavassori (Quarterfinals)
 * align=left| 🇦🇹 AUT Sebastian Ofner (Semifinals)
 * align=left| 🇦🇷 ARG Juan Manuel Cerúndolo (Final)
 * align=left| POR João Sousa (First Round)
 * align=left| 🇯🇵 JPN Kaichi Uchida (Quarterfinals)
 * align=left| 🇭🇺 HUN Zsombor Piros (Champion)
 * align=left| 🇮🇹 ITA Andrea Vavassori (Quarterfinals)
 * align=left| POR João Sousa (First Round)
 * align=left| 🇯🇵 JPN Kaichi Uchida (Quarterfinals)
 * align=left| 🇭🇺 HUN Zsombor Piros (Champion)
 * align=left| 🇮🇹 ITA Andrea Vavassori (Quarterfinals)
 * align=left| 🇯🇵 JPN Kaichi Uchida (Quarterfinals)
 * align=left| 🇭🇺 HUN Zsombor Piros (Champion)
 * align=left| 🇮🇹 ITA Andrea Vavassori (Quarterfinals)
 * align=left| 🇭🇺 HUN Zsombor Piros (Champion)
 * align=left| 🇮🇹 ITA Andrea Vavassori (Quarterfinals)
 * align=left| 🇮🇹 ITA Andrea Vavassori (Quarterfinals)
 * align=left| 🇮🇹 ITA Andrea Vavassori (Quarterfinals)

Doubles
{| class="wikitable" style="text-align:center;font-size:90%" !width=40| Seed !width=150| Country !width=150| Player !width=60| Result !width=190| Playing against }}
 * align=left| 🇧🇷 BRA Marcelo Demoliner 🇮🇹 ITA Andrea Vavassori (Final)
 * align=left| 🇮🇳 IND Sriram Balaji 🇮🇳 IND Jeevan Nedunchezhiyan (First Round)
 * align=left| MON Romain Arneodo 🇦🇹 AUT Sam Weissborn (withdrew)
 * align=left| 🇷🇴 ROU Victor Vlad Cornea CRO Franko Škugor (Champions)
 * align=left| 🇮🇹 ITA Marco Bortolotti 🇪🇸 ESP Sergio Martos Gornés (Semifinals)
 * align=left| 🇮🇳 IND Sriram Balaji 🇮🇳 IND Jeevan Nedunchezhiyan (First Round)
 * align=left| MON Romain Arneodo 🇦🇹 AUT Sam Weissborn (withdrew)
 * align=left| 🇷🇴 ROU Victor Vlad Cornea CRO Franko Škugor (Champions)
 * align=left| 🇮🇹 ITA Marco Bortolotti 🇪🇸 ESP Sergio Martos Gornés (Semifinals)
 * align=left| MON Romain Arneodo 🇦🇹 AUT Sam Weissborn (withdrew)
 * align=left| 🇷🇴 ROU Victor Vlad Cornea CRO Franko Škugor (Champions)
 * align=left| 🇮🇹 ITA Marco Bortolotti 🇪🇸 ESP Sergio Martos Gornés (Semifinals)
 * align=left| 🇷🇴 ROU Victor Vlad Cornea CRO Franko Škugor (Champions)
 * align=left| 🇮🇹 ITA Marco Bortolotti 🇪🇸 ESP Sergio Martos Gornés (Semifinals)
 * align=left| 🇮🇹 ITA Marco Bortolotti 🇪🇸 ESP Sergio Martos Gornés (Semifinals)
 * align=left| 🇮🇹 ITA Marco Bortolotti 🇪🇸 ESP Sergio Martos Gornés (Semifinals)

Singles

 * Seeds
 * Draw

Doubles

 * Seeds
 * Draw