2022 Shimadzu All Japan Indoor Tennis Championships – Singles

Xun Fangying was the defending champion but chose not to participate.

Miyu Kato won the title, defeating Yuriko Miyazaki in the final, 6–4, 2–6, 6–2.

Seeds
• # 🇯🇵 Misaki Doi (second round)

• # 🇺🇸 Sachia Vickery (quarterfinals)

• # 🇨🇦 Carol Zhao (semifinals)

• # 🇬🇧 Yuriko Miyazaki (final)

• # 🇯🇵 Kyōka Okamura (semifinals)

• # 🇯🇵 Sakura Hosogi (quarterfinals)

• # 🇹🇭 Peangtarn Plipuech (first round)

• # 🇹🇭 Luksika Kumkhum (quarterfinals)