Rainy Season Mattress Mold and Mite Concerns: Over 80% Worry About Bedding Humidity, Yet About 10% Take No Action

During the rainy season, when humidity rises and bedding becomes damp, concerns about mold and mites increase. Moon Moon Inc., which operates the sleep product introduction site "Kaimin Land," conducted a survey on "Mattress Moisture and Mold Countermeasures During the Rainy Season" targeting 200 men and women in their 20s to 60s nationwide who currently use a mattress. The results revealed that while over 80% (86.5%) feel anxious about bedding humidity and over 90% are concerned about health impacts, many are not taking sufficient measures due to reasons such as "not knowing the correct method" or "it's a hassle."

Survey Background

In the high-humidity environment of the rainy season, it is said that a person sweats about one glass of water per night, and moisture accumulates inside the mattress more than one might imagine. This can easily become a breeding ground for mold, mites, and allergens, potentially causing health problems such as asthma and allergies. This survey focused on the health axis of "mold, mites, and allergies" specific to the rainy season, visualizing the "gap between anxiety and practice" that exists between consumers' concerns about bedding and their actual countermeasure status.

Survey Summary

86.5% of people are concerned about "humidity" in mattresses and bedding during the rainy season

Top past troubles were "dampness causing poor sleep comfort" (19.8%) and "musty smell/mold odor" (18.1%)

91.5% believe that humidity, mold, and mites affect health

Top reasons for not taking measures were "it's a hassle/time-consuming" (19.7%) and "don't know the correct method" (14.4%)

Most desired information is "correct drying and airing methods" (34.5%)

* When citing this survey, please include the URL of "Kaimin Land" (https://intiinti.com/goodsleep/).

Detailed Data

Q1. Are you concerned about "humidity" in mattresses and bedding during the rainy season?

Somewhat concerned: 59.5%

Very concerned: 27.0%

Not very concerned: 8.5%

Not at all concerned: 3.0%

Had never thought about it: 2.0%

→ Combining "somewhat concerned" and "very concerned" totals 86.5%, indicating that nearly 90% of people feel discomfort or anxiety about bedding humidity during the rainy season.

Q2. Have you ever experienced problems with mattress humidity, mold, or mites?

Dampness caused poor sleep comfort: 19.8%

Musty smell/mold odor was bothersome: 18.1%

Black spots or stains appeared: 16.7%

Mold grew on the mattress: 13.0%

No experience with problems: 10.8%

Other: 21.6% (bitten by mites/itching: 10.2%, sneezing/rhinitis worsened: 5.7%, condensation/water droplets on mattress back or floor: 3.4%, etc.)

→ The majority have experienced not only discomfort like "poor sleep comfort" but also actual physical damage such as "odor," "black spots," and "mold growth." This suggests that neglecting the issue inevitably leads to bedding deterioration.

Q3. What measures do you take against mattress humidity and mold during the rainy season?

Ventilate frequently: 23.3%

Dry in shade/lean to dry: 16.6%

Wash covers/sheets frequently: 14.2%

Use dehumidifier or air conditioner dehumidification function: 13.5%

Use dehumidifying sheets or slatted bed bases: 9.6%

Other: 22.8% (use vacuum cleaner/futon cleaner: 8.7%, use anti-mold/anti-mite products: 5.4%, use futon dryer: 4.8%, etc.)

→ Easy actions like "ventilation" and "drying in the shade" are ranked high. However, considering Japanese housing conditions, the question remains whether these methods are sufficient to remove internal moisture. Additionally, about 10% (as part of multiple responses) are not taking any specific measures.

Q4. What are the reasons for not taking (or being unable to take) humidity/mold countermeasures?

Already taking measures: 26.2%

It's a hassle/time-consuming: 19.7%

Don't know the correct method: 14.4%

No space to dry/air out: 9.5%

Unsure if it's effective: 8.3%

Other: 21.9% (too heavy to move: 8.2%, too busy/no time: 6.9%, don't feel the need: 2.6%, etc.)

→ It is clear that "hassle," "lack of knowledge," and "physical space limitations" are major barriers to taking action. This reflects the real modern dilemma of "knowing they should do it, but not being able to act."

Q5. Do you think mattress humidity, mold, and mites affect health?

Think it somewhat affects: 55.0%

Think it greatly affects: 36.5%

Cannot say either way: 6.5%

Think it has little effect: 1.5%

Think it has no effect at all: 0.5%

→ An overwhelming 91.5% are concerned about negative health effects. This is strongly recognized not just as "bedding dirt" but as a problem directly linked to personal healthcare, such as "sleep quality" and "allergic diseases."

Q6. What information about mattress humidity during the rainy season are you most interested in?

Correct drying and airing methods: 34.5%

Placement and bedroom environment to prevent mold: 28.0%

How to deal with mold once it appears: 14.5%

How to choose dehumidifying products: 10.5%

Methods for removing mites and allergens: 8.5%

Guidelines for replacement and disposal: 4.0%

→ Demand for "correct care methods" and "ways to create a preventive environment" that can be practiced daily exceeded 60%. There is a strong need for easy-to-follow, reliable maintenance information.

Summary of Survey Results

This survey revealed that consumers feel strong anxiety and health risks regarding mattress humidity during the rainy season. While many have experienced mold or odors in the past, there is a "gap between anxiety and practice" where they are not taking fundamental measures due to reasons like "it's a hassle" or "I don't know the right way." Neglecting humidity not only shortens the lifespan of bedding but also increases the risk of health problems from mites and allergens. Going forward, there is a greater need for awareness-raising that protects health while reducing consumer burden, such as "correct dehumidification care that can be done without effort" and choosing bedding with excellent breathability and easy maintenance.

Comment from Kaimin Land Operator

Comment from operator: Koichi Takeda

These results highlight the real dilemma: "People know mold and mites are bad for health, but it's realistically difficult to air out heavy mattresses or care for them daily." For bedding humidity countermeasures, rather than doing a major cleaning once, it is most effective to "effortlessly continue" small daily tricks (like moving the air in the bedroom, using dehumidifying pads, etc.). Also, when reconsidering bedding, it is important to choose items that fit your lifestyle, such as "lightweight for easy leaning" or "washable materials." Kaimin Land will continue to help busy modern people easily maintain a clean sleep environment and live healthy lives.