Talk:2023-05-08 Mauthausen (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| 🇦🇹 AUT Dominic Thiem (Semifinals)
 * align=left| 🇫🇷 FRA Hugo Gaston (Quarterfinals)
 * align=left| 🇦🇷 ARG Facundo Bagnis (Quarterfinals)
 * align=left| NED Gijs Brouwer (First Round)
 * align=left| 🇦🇹 AUT Filip Misolic (Final)
 * align=left| 🇦🇹 AUT Sebastian Ofner (Semifinals)
 * align=left| SUI Leandro Riedi (Second Round, Retired)
 * align=left| 🇦🇹 AUT Dennis Novak (Quarterfinals)
 * align=left| 🇦🇷 ARG Facundo Bagnis (Quarterfinals)
 * align=left| NED Gijs Brouwer (First Round)
 * align=left| 🇦🇹 AUT Filip Misolic (Final)
 * align=left| 🇦🇹 AUT Sebastian Ofner (Semifinals)
 * align=left| SUI Leandro Riedi (Second Round, Retired)
 * align=left| 🇦🇹 AUT Dennis Novak (Quarterfinals)
 * align=left| 🇦🇹 AUT Filip Misolic (Final)
 * align=left| 🇦🇹 AUT Sebastian Ofner (Semifinals)
 * align=left| SUI Leandro Riedi (Second Round, Retired)
 * align=left| 🇦🇹 AUT Dennis Novak (Quarterfinals)
 * align=left| 🇦🇹 AUT Sebastian Ofner (Semifinals)
 * align=left| SUI Leandro Riedi (Second Round, Retired)
 * align=left| 🇦🇹 AUT Dennis Novak (Quarterfinals)
 * align=left| SUI Leandro Riedi (Second Round, Retired)
 * align=left| 🇦🇹 AUT Dennis Novak (Quarterfinals)
 * align=left| 🇦🇹 AUT Dennis Novak (Quarterfinals)
 * align=left| 🇦🇹 AUT Dennis Novak (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| MON Romain Arneodo 🇦🇹 AUT Sam Weissborn (Champions)
 * align=left| 🇷🇸 SRB Nikola Ćaćić 🇰🇿 KAZ Aleksandr Nedovyesov (Quarterfinals)
 * align=left| 🇺🇸 USA Robert Galloway 🇲🇽 MEX Miguel Ángel Reyes-Varela (Quarterfinals)
 * align=left| 🇮🇳 IND Sriram Balaji 🇮🇳 IND Jeevan Nedunchezhiyan (Quarterfinals)
 * align=left| 🇷🇸 SRB Nikola Ćaćić 🇰🇿 KAZ Aleksandr Nedovyesov (Quarterfinals)
 * align=left| 🇺🇸 USA Robert Galloway 🇲🇽 MEX Miguel Ángel Reyes-Varela (Quarterfinals)
 * align=left| 🇮🇳 IND Sriram Balaji 🇮🇳 IND Jeevan Nedunchezhiyan (Quarterfinals)
 * align=left| 🇺🇸 USA Robert Galloway 🇲🇽 MEX Miguel Ángel Reyes-Varela (Quarterfinals)
 * align=left| 🇮🇳 IND Sriram Balaji 🇮🇳 IND Jeevan Nedunchezhiyan (Quarterfinals)
 * align=left| 🇺🇸 USA Robert Galloway 🇲🇽 MEX Miguel Ángel Reyes-Varela (Quarterfinals)
 * align=left| 🇮🇳 IND Sriram Balaji 🇮🇳 IND Jeevan Nedunchezhiyan (Quarterfinals)
 * align=left| 🇮🇳 IND Sriram Balaji 🇮🇳 IND Jeevan Nedunchezhiyan (Quarterfinals)
 * align=left| 🇮🇳 IND Sriram Balaji 🇮🇳 IND Jeevan Nedunchezhiyan (Quarterfinals)

Singles

 * Seeds
 * Draw

Doubles

 * Seeds
 * Draw