Clinic For Group, which provides both in-person and online medical consultations, announced the results of the third installment of its 2026 survey on the “tolerance loss” caused by irregular periods, focusing on working women. The analysis covers responses from 427 working women aged 18 to 49 across Japan, including company employees, executives, public servants, self-employed workers, and part-time workers. The survey suggests that the post-Golden Week period, often associated in Japan with so-called “May blues,” may place mental and physical stress on working women through new workplace relationships, pressure, and fatigue from the start of the fiscal year, potentially affecting menstrual irregularities. Nearly half of working women, 48.1%, cited “interpersonal stress” as one factor affecting irregular periods, while 40.9% cited “pressure and a sense of responsibility” at work. The survey also found signs of a “negative loop” in which irregular periods lead to physical discomfort that then affects work and mental health. Among working women who felt they could not control their body or condition because of irregular periods, 50.3% reported negative effects on work, such as difficulty concentrating, more mistakes, or being unable to speak up in meetings. Another 47.8% reported negative effects on mental health, such as self-dislike or difficulty staying positive. At the same time, nearly 90% of respondents knew that irregular periods can be medically managed, yet only 17.3% had actually taken measures through a medical institution. About one in three said they knew there were ways to improve the condition but had not taken action. Among working women not currently visiting a gynecologist, 43.6% had gone more than a year without seeking care after becoming aware of their irregular periods. The main reasons were that symptoms were “tolerable” (39.4%), that they had “gotten used to it” (39.4%), and that visiting a doctor was “troublesome” (32.4%). The findings highli