2023 Matsuyama Challenger – Singles

Hong Seong-chan was the defending champion but lost in the first round to Luca Nardi.

Nardi won the title after defeating Taro Daniel 3–6, 6–4, 6–2 in the final.

Seeds
• # 🇯🇵 Taro Daniel (final)

• # 🇯🇵 Shintaro Mochizuki (second round)

• # 🇮🇹 Luca Nardi (champion)

• # 🇯🇵 Sho Shimabukuro (second round)

• # 🇩🇪 Benjamin Hassan (quarterfinals)

• # 🇦🇺 Marc Polmans (first round)

• # 🇨🇳 Bu Yunchaokete (quarterfinals)

• # Hsu Yu-hsiou (quarterfinals)