Japanese mother develops period-proof panties to help schoolgirls’ transition to puberty
- Mayumi Miyaguchi’s ‘absorbent shorts’ have gained popularity as they have proved effective while being cheaper than those used by adults
- ‘It’s weird that girls have to sneak around when they have their periods,’ the Osaka-based entrepreneur says

Mayumi Miyaguchi, owner of an apparel company in the city of Osaka, has produced a line of “absorbent shorts” for elementary and junior high school girls who may feel embarrassed about carrying sanitary towels to school.
The idea came to her two years ago when her daughter was about to have her first period. The period-proof panties developed by Miyaguchi have been gaining popularity as they have proved effective while being cheaper than those used by adults.
It’s weird that girls have to sneak around when they have their periods
Although Miyaguchi initially told her daughter to “tuck her napkins away so that they aren’t noticeable” when going to school, she felt it was strange for her daughter to feel the need to hide them since there is nothing shameful about using them.
“It’s weird that girls have to sneak around when they have their periods,” Miyaguchi said. “My daughter’s generation should have more freedom.”
Period-proof panties originated in Europe and the US, and Japanese manufacturers have only entered the market in the past several years. They are one of the representative products of “femtech,” which uses special fibres and aims to embrace technology to solve problems specific to women.
Recent newcomers to period-proof underwear include G.U. Co., a unit of Fast Retailing Co., the owner of casual fashion brand Uniqlo.