2019 Kobe Challenger – Singles

Tatsuma Ito was the defending champion but retired in the second round to Tseng Chun-hsin.

Yosuke Watanuki won the title after defeating Yūichi Sugita 6–2, 6–4 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇯🇵 Yasutaka Uchiyama (second round, retired)

• # 🇯🇵 Yūichi Sugita (final)

• # 🇯🇵 Go Soeda (quarterfinals)

• # 🇦🇺 James Duckworth (second round)

• # 🇯🇵 Tatsuma Ito (second round, retired)

• # 🇨🇳 Zhang Zhizhen (withdrew)

• # 🇪🇸 Enrique López Pérez (second round)

• # 🇬🇧 Jay Clarke (third round)

• # 🇮🇳 Ramkumar Ramanathan (quarterfinals)

• # 🇨🇳 Bai Yan (second round)

• # 🇯🇵 Hiroki Moriya (quarterfinals)

• # Wu Tung-lin (second round)

• # 🇨🇳 Li Zhe (second round)

• # 🇦🇺 Akira Santillan (second round, retired)

• # 🇰🇷 Lee Duck-hee (second round)

• # 🇰🇷 Nam Ji-sung (quarterfinals, retired)