2011 Kōfu International Open – Singles

Sachie Ishizu was the defending champion, but lost to Tamarine Tanasugarn in the second round. Chang Kai-chen won the title, defeating Mandy Minella 6–4, 1–6, 6–4 in the final.

Seeds
• # 🇹🇭 Tamarine Tanasugarn (semifinals)

• # 🇯🇵 Erika Sema (semifinals)

• # 🇹🇭 Noppawan Lertcheewakarn (first round)

• # Chang Kai-chen (champion)

• # 🇱🇺 Mandy Minella (final)

• # 🇯🇵 Yurika Sema (quarterfinals)

• # 🇯🇵 Junri Namigata (quarterfinals)

• # 🇯🇵 Aiko Nakamura (first round)