2019 Yokkaichi Challenger – Singles

This was the first edition of the tournament.

Yūichi Sugita won the title after defeating James Duckworth 3–6, 6–3, 7–6(7–1) in the final.

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

• # 🇦🇺 James Duckworth (final)

• # 🇯🇵 Tatsuma Ito (semifinals)

• # 🇰🇷 Chung Hyeon (quarterfinals, withdrew)

• # 🇯🇵 Yūichi Sugita (champion)

• # 🇨🇳 Zhang Ze (second round)

• # 🇯🇵 Hiroki Moriya (third round)

• # 🇰🇷 Chung Yun-seong (third round)

• # 🇮🇳 Saketh Myneni (quarterfinals)

• # Wu Tung-lin (quarterfinals)

• # 🇰🇷 Nam Ji-sung (quarterfinals)

• # Yang Tsung-hua (third round)

• # 🇯🇵 Makoto Ochi (second round)

• # 🇯🇵 Yusuke Takahashi (third round)

• # 🇯🇵 Renta Tokuda (second round)

• # Lý Hoàng Nam (second round)