Talk:2023-06-05 Heilbronn (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| 🇮🇹 ITA Marco Cecchinato (First Round)
 * align=left| 🇪🇸 ESP Jaume Munar (Quarterfinals)
 * align=left| 🇨🇴 COL Daniel Elahi Galán (Quarterfinals)
 * align=left| 🇦🇹 AUT Dominic Thiem (Second Round)
 * align=left| 🇮🇹 ITA Matteo Arnaldi (Champion)
 * align=left| 🇭🇺 HUN Fábián Marozsán (Second Round)
 * align=left| 🇩🇪 GER Oscar Otte (First Round)
 * align=left| 🇷🇺 RUS Pavel Kotov (Quarterfinals)
 * align=left| 🇨🇴 COL Daniel Elahi Galán (Quarterfinals)
 * align=left| 🇦🇹 AUT Dominic Thiem (Second Round)
 * align=left| 🇮🇹 ITA Matteo Arnaldi (Champion)
 * align=left| 🇭🇺 HUN Fábián Marozsán (Second Round)
 * align=left| 🇩🇪 GER Oscar Otte (First Round)
 * align=left| 🇷🇺 RUS Pavel Kotov (Quarterfinals)
 * align=left| 🇮🇹 ITA Matteo Arnaldi (Champion)
 * align=left| 🇭🇺 HUN Fábián Marozsán (Second Round)
 * align=left| 🇩🇪 GER Oscar Otte (First Round)
 * align=left| 🇷🇺 RUS Pavel Kotov (Quarterfinals)
 * align=left| 🇭🇺 HUN Fábián Marozsán (Second Round)
 * align=left| 🇩🇪 GER Oscar Otte (First Round)
 * align=left| 🇷🇺 RUS Pavel Kotov (Quarterfinals)
 * align=left| 🇩🇪 GER Oscar Otte (First Round)
 * align=left| 🇷🇺 RUS Pavel Kotov (Quarterfinals)
 * align=left| 🇷🇺 RUS Pavel Kotov (Quarterfinals)
 * align=left| 🇷🇺 RUS Pavel Kotov (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 (First Round)
 * align=left| 🇮🇳 IND Yuki Bhambri 🇮🇳 IND Saketh Myneni (First Round)
 * align=left| 🇷🇴 ROU Victor Vlad Cornea 🇦🇹 AUT Philipp Oswald (Final)
 * align=left| 🇰🇿 KAZ Andrey Golubev 🇺🇦 UKR Denys Molchanov (Semifinals)
 * align=left| 🇮🇳 IND Yuki Bhambri 🇮🇳 IND Saketh Myneni (First Round)
 * align=left| 🇷🇴 ROU Victor Vlad Cornea 🇦🇹 AUT Philipp Oswald (Final)
 * align=left| 🇰🇿 KAZ Andrey Golubev 🇺🇦 UKR Denys Molchanov (Semifinals)
 * align=left| 🇷🇴 ROU Victor Vlad Cornea 🇦🇹 AUT Philipp Oswald (Final)
 * align=left| 🇰🇿 KAZ Andrey Golubev 🇺🇦 UKR Denys Molchanov (Semifinals)
 * align=left| 🇷🇴 ROU Victor Vlad Cornea 🇦🇹 AUT Philipp Oswald (Final)
 * align=left| 🇰🇿 KAZ Andrey Golubev 🇺🇦 UKR Denys Molchanov (Semifinals)
 * align=left| 🇰🇿 KAZ Andrey Golubev 🇺🇦 UKR Denys Molchanov (Semifinals)
 * align=left| 🇰🇿 KAZ Andrey Golubev 🇺🇦 UKR Denys Molchanov (Semifinals)

Singles

 * Seeds
 * Draw

Doubles

 * Seeds
 * Draw