The 1981 Toray Sillook Open was a women's singles tennis tournament played on indoor carpet courts at Yoyogi National Gymnasium in Tokyo in Japan.

The event was part of the Category 3[a] of the 1981 Toyota Series.

It was the ninth edition of the tournament and was held from 14 September through 20 September 1981.

Unseeded Ann Kiyomura won the title and earned $34,000 first-prize money.

[2][1] Ann Kiyomura defeated Bettina Bunge 6–4, 7–5