Friends with YAMATO Waki and TADATSU Youko.

Unlike the Year 24 Group, these three are known for traditional shoujo themes. Nonetheless, they too were instrumental in revitalizing the shoujo demographic.

In the late 1990s, Igarashi became involved in a number of legal battles related to her intellectual property rights as an illustrator. Igarashi claimed that in series for which she was the illustrator, she should hold sole intellectual property rights to the portrayals of the characters, and not need the consent of her authors to license merchandise based on their likenesses. In a dispute over the Candy Candy character designs in 1999, the court ruled against Igarashi, stating that both she and writer NAGITA Keiko held equal rights to the characters.

Former assistant of SATO Masaaki.

TSUBAKI Kasuga was her assistant.