Talk:2023-05-15 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| 🇦🇷 ARG Pedro Cachin (Quarterfinals)
 * align=left| 🇫🇷 FRA Hugo Gaston (First Round, Retired)
 * align=left| 🇲🇩 MDA Radu Albot (Quarterfinals)
 * align=left| 🇪🇨 ECU Emilio Gómez (First Round)
 * align=left| 🇦🇷 ARG Facundo Bagnis (First Round)
 * align=left| 🇦🇺 AUS Aleksandar Vukic (Final)
 * align=left| 🇦🇷 ARG Facundo Díaz Acosta (Champion)
 * align=left| 🇦🇺 AUS Rinky Hijikata (First Round)
 * align=left| 🇲🇩 MDA Radu Albot (Quarterfinals)
 * align=left| 🇪🇨 ECU Emilio Gómez (First Round)
 * align=left| 🇦🇷 ARG Facundo Bagnis (First Round)
 * align=left| 🇦🇺 AUS Aleksandar Vukic (Final)
 * align=left| 🇦🇷 ARG Facundo Díaz Acosta (Champion)
 * align=left| 🇦🇺 AUS Rinky Hijikata (First Round)
 * align=left| 🇦🇷 ARG Facundo Bagnis (First Round)
 * align=left| 🇦🇺 AUS Aleksandar Vukic (Final)
 * align=left| 🇦🇷 ARG Facundo Díaz Acosta (Champion)
 * align=left| 🇦🇺 AUS Rinky Hijikata (First Round)
 * align=left| 🇦🇺 AUS Aleksandar Vukic (Final)
 * align=left| 🇦🇷 ARG Facundo Díaz Acosta (Champion)
 * align=left| 🇦🇺 AUS Rinky Hijikata (First Round)
 * align=left| 🇦🇷 ARG Facundo Díaz Acosta (Champion)
 * align=left| 🇦🇺 AUS Rinky Hijikata (First Round)
 * align=left| 🇦🇺 AUS Rinky Hijikata (First Round)
 * align=left| 🇦🇺 AUS Rinky Hijikata (First Round)

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| 🇺🇸 USA Hunter Reese 🇵🇱 POL Szymon Walków (First Round)
 * align=left| 🇧🇾 BLR Ivan Liutarevich 🇺🇦 UKR Vladyslav Manafov (First Round)
 * align=left| 🇬🇧 GBR Luke Johnson NED Sem Verbeek (Champions)
 * align=left| 🇮🇳 IND Purav Raja 🇮🇳 IND Divij Sharan (First Round)
 * align=left| 🇧🇾 BLR Ivan Liutarevich 🇺🇦 UKR Vladyslav Manafov (First Round)
 * align=left| 🇬🇧 GBR Luke Johnson NED Sem Verbeek (Champions)
 * align=left| 🇮🇳 IND Purav Raja 🇮🇳 IND Divij Sharan (First Round)
 * align=left| 🇬🇧 GBR Luke Johnson NED Sem Verbeek (Champions)
 * align=left| 🇮🇳 IND Purav Raja 🇮🇳 IND Divij Sharan (First Round)
 * align=left| 🇬🇧 GBR Luke Johnson NED Sem Verbeek (Champions)
 * align=left| 🇮🇳 IND Purav Raja 🇮🇳 IND Divij Sharan (First Round)
 * align=left| 🇮🇳 IND Purav Raja 🇮🇳 IND Divij Sharan (First Round)
 * align=left| 🇮🇳 IND Purav Raja 🇮🇳 IND Divij Sharan (First Round)

Singles

 * Seeds
 * Draw

Doubles

 * Seeds
 * Draw