New Launch: tu-hacci's Antibacterial, Odor-Resistant Sanitary Shorts Address Summer Period Concerns, as 90% of Women Worry About Odor and Moisture

tu-hacci (pronounced 'tsu-hatchi'), an inner fashion brand operated by WaterAir Co., Ltd. (Headquarters: Nishi-ku, Hiroshima City, Hiroshima Prefecture; CEO: Shunosuke Kuniyasu), has conducted a 'Survey on Women's Realities During Summer Periods' targeting approximately 230,000 of its social media followers. The results revealed that 90% of respondents worry about odor and moisture during summer, while nearly 70% experience skin discomfort due to sweat-induced stickiness. To address these concerns, tu-hacci will launch its new 'Antibacterial and Odor-Resistant Sanitary Shorts' on Wednesday, July 15, 2026, offering both high-level hygiene protection and a stress-free wearing experience for women to feel beautiful and comfortable even during their periods.

Japan's summers are becoming increasingly severe. Women's struggles with skin discomfort and odor during menstruation

Due to global warming, Japan's summers are getting hotter each year, with prolonged heatwaves becoming the new normal. While awareness of self-care and hygiene is rising in these hot and humid conditions, women's period-specific concerns are becoming more serious.

During summer menstruation, many women are particularly anxious about 'moisture buildup' and 'odor leakage' caused by sweat and menstrual flow, leading to constant unease in daily life. Additionally, in a season when sweating is more prevalent, skin irritations such as itching and pain caused by seams or tight elastic bands in sanitary shorts are more likely to occur. As consumers increasingly demand underwear that combines both design and functionality, tu-hacci conducted this survey to uncover what women truly need during their sensitive days.

Visualizing the real voices and realities of women during menstruation

To uncover the genuine pain points and challenges women face during their periods, tu-hacci conducted the 'Survey on Women's Realities During Summer Periods' among its official Instagram followers.

The survey collected broad feedback—from summer-specific hygiene concerns to discomfort related to underwear fit—aiming to identify insights that help women feel more comfortable during their delicate times.

Three major concerns during summer menstruation

Finding 1: 'Moisture and Itching' (63%) and 'Odor' (27%) account for 90% of summer period concerns

When asked what they worry about most during summer periods, 63% of respondents cited 'moisture and itching,' followed by 27% who mentioned 'odor.' These two major summer-specific discomforts collectively represent 90% of all concerns, highlighting a clear majority.

Finding 2: 67% of women experience skin stress from the 'stickiness' of sanitary shorts

When asked about their experience with underwear comfort, 67% of women reported having felt stressed due to 'stickiness from sweat and moisture.' This reveals that in the summer, when skin is more sensitive, the design of sanitary shorts directly impacts skin health.

Summer menstruation requires both 'hygiene management for the intimate area' and 'reduction of physical skin irritation'

As the survey results show, the challenges during summer periods go beyond hygiene-related anxieties such as 'odor' and 'moisture' caused by sweat and menstrual flow. With nearly 70% of women experiencing skin stress from sticky underwear, it's clear that women face a dual challenge: needing both 'functional protection against leaks and odor' and 'gentle, skin-friendly materials suitable for hot weather.'

Therefore, what's truly needed in summer sanitary care is a design that combines high antibacterial, anti-odor, and waterproof performance with a structure that frees sensitive skin from tightness. Rather than compromising on either hygiene or comfort, a solution that excels in both areas is essential to improving modern women's quality of life during summer.

Introducing a new choice to make 'blue days' beautiful and comfortable

As an inner fashion brand that views underwear as a fashion statement, tu-hacci values both women's desire to 'live beautifully and authentically' and their need to 'feel stress-free in every season.'

In response to the 'summer period stress' revealed in this survey, tu-hacci has developed the 'Antibacterial and Odor-Resistant Sanitary Shorts'—a gentle solution that embraces women's sensitive needs. We offer a new sanitary lifestyle where women don't wear these shorts out of obligation, but for the peace of mind they bring.

Product Features

High-standard antibacterial and odor-resistant design that thoroughly eliminates unwanted odor

Features a special treatment verified by a third-party institution to achieve an exceptionally high 'antibacterial activity value of 5.9.' This suppresses the growth of odor-causing bacteria in summer, maintaining freshness throughout the day, even when sanitary pads cannot be changed frequently.

Double gusset design and customizable waterproof lining for exceptional leak protection

The crotch area features a convenient double gusset structure that secures pad wings, providing reliable side-leak protection even on heavy flow days.

Additionally, two types with different waterproof lining lengths are available, ensuring peace of mind during nighttime movements.

The design features the same beautiful lace pattern as the popular 'Morning Routine Bra,' allowing for stylish matching sets.

Stress-free, rubber-free and cotton-blend design that gently protects sensitive skin

Adopts a 'rubber-free design' with no elastic at the leg openings or waistband. Made from soft cotton-blend fabric, it reduces moisture buildup and minimizes skin irritation such as itching and redness, even during hot, sweaty summer days.

Product Information

Product Name: Antibacterial and Odor-Resistant Sanitary Shorts

Price: ¥2,790 and up (tax included)

Sizes: M, L, XL

Colors: Black, Grayish Beige (2 colors)

Product Page: https://x.gd/yUr2j

Survey Overview

Survey Period: Early July 2026 (24-hour survey)

Target: tu-hacci's official Instagram followers

Method: Internet survey via Instagram Stories

Conducted by: WaterAir Co., Ltd. (tu-hacci)

Multiple Responses Allowed: Single response only

About tu-hacci

Brand Concept

Enrich your life.

Committed to enriching women's lifestyles by treating underwear as a fashion essential.

tu-hacci is an inner fashion brand that empowers your freedom and confidence. We deliver beautifully designed, high-quality products that support you in living authentically and beautifully.

Official tu-hacci Website

https://www.tu-hacci.co.jp/

Official SNS

LINE: @tu_hacci

Instagram: @tu_hacci

X (formerly Twitter): @tu_hacci

TikTok: @tu_hacci_official

Threads: @tu_hacci

Company Overview

WaterAir Co., Ltd. (https://waterair.jp/)

Headquarters: 3-24-19 Misasagi-cho, Nishi-ku, Hiroshima City, Hiroshima Prefecture

Business