2019 Shimadzu All Japan Indoor Tennis Championships – Singles

This was the first edition of the women's tournament.

Ylena In-Albon won the title, defeating Zhang Kailin in the final, 6–2, 6–3.

Seeds
• # 🇯🇵 Nao Hibino (semifinals)

• # 🇯🇵 Kurumi Nara (quarterfinals)

• # 🇨🇳 Liu Fangzhou (second round)

• # 🇯🇵 Ayano Shimizu (first round)

• # 🇨🇳 Xun Fangying (first round)

• # Liang En-shuo (first round)

• # Ylena In-Albon (champion)

• # 🇨🇳 Zhang Kailin (final)