was a Japanese-style painter and illustrator, best known for her contributions to art for children. She was active from the end of the Taishà  era until the beginning of the Shà Âwa era.
Tomoe Iwaoka was born on June 15, 1896, in Tokyo, Japan. Her father was a prominent lawyer named . In 1912 when Tomoe was 16, her father was elected to the 11th House of Representatives in Japan. Tomoe Iwaoka died on November 7, 1933, in Tokyo at the age of 37.
Tomoe regularly contributed to the popular children's magazine Kodomo no Kuni (children's magazine) that was published monthly in Japan from 1922 to 1944. The magazine was the first in Japan to hire multiple, rotating illustrators rather than hiring a select number of in-house artists. Other employees of the publication included Kiichi Okamoto, Shinpei Nakayama, Hakushu Kitahara, and Yumeji Takehisa. By 1932, the magazine had published the contributions of more than one hundred artists, approximately twenty-five of whom were women.
The following is a small selection of Kodomo no Kuni issues known to feature illustrations by Tomoe Iwaoka:
Numerous children's books illustrated by Tomoe Iwaoka are now housed in the National Diet Library in Tokyo.