Review Your Foot Care Before the Rainy Season. Shoe Dehumidifier and Deodorizer "Karatto Hero Legend" with Approximately Double the Content from the Previous Model Appears on Makuake from April 30th

Yamajin Yakuhin Co., Ltd. (Headquarters: Shiga Prefecture, Representative Director: Yasuko Sekiya) will begin pre-selling "Shoshu Onsite Karatto Hero Legend," a shoe dehumidifier and deodorizer, on the new product crowdfunding platform "Makuake" from 12:00 PM on Thursday, April 30, 2026.

This product is an upgraded version of the previous "Shoshu Onsite Karatto Hero," which recorded over 7 million yen in crowdfunding support. Responding to feedback from previous users, the content has been increased to approximately double, further strengthening measures against stuffiness and odors that tend to accumulate in shoes on rainy days or after long hours of wear. It is an recommended item for shoe moisture control during the rainy season, as well as for daily shoe care for business shoes, rain boots, boots, and work shoes, which often trap stuffiness and odors.

[Project Page] https://www.makuake.com/project/karatto-hero-legend/

Increasing Shoe Stuffiness and Odor Concerns Before the Rainy Season

The rainy season, with its increased rainy days, is a time when moisture easily accumulates inside shoes. In fact, a survey shows that 89.5% of people nationwide are concerned about their shoes getting wet or moisture in their shoe closets during the rainy season.

Furthermore, in a survey regarding commuting items during the rainy season, 74.0% of men in their 20s to 50s responded that they "have had problems with commuting items during the rainy season." Specific concerns primarily included foot discomfort such as "shoes and socks getting wet and uncomfortable" and "stuffiness and odor becoming bothersome."

Compared to moisture countermeasures for clothing and rooms, shoe care tends to be neglected. Yamajin Yakuhin has leveraged its technology cultivated as a silica gel desiccant manufacturer to address "invisible discomfort" hidden in daily life, focusing on foot moisture and odor.

Upgraded to Approximately Double the Content from the Previous Model. Upgraded Based on User Feedback

The previous "Karatto Hero" was a shoe dehumidifier and deodorizer developed based on feedback from athletes suffering from foot stuffiness and odor. It featured pop colors, a design that fits the tip of any shoe regardless of shape, and specifications that allowed repeated use by sun-drying, receiving support from many backers on Makuake.

After product delivery, in addition to words of encouragement, various feedback leading to the development of the next product was received.

- "We want stronger deodorizing power."
- "We want to use it for rain boots and regular boots too."
- "We want something that works powerfully for work shoes and leather shoes too."

In response to this feedback, for the "Karatto Hero Legend," the amount of silica gel has been increased to approximately double that of the previous model. It was developed as an upgraded version with enhanced moisture absorption and odor adsorption, making it easier to use for rain boots, regular boots, work shoes, and leather shoes.

Simultaneous Care for Shoe Discomfort from Both "Moisture Absorption" and "Odor Adsorption"

Shoe discomfort is not caused solely by moisture.

In addition to stuffiness from sweat and rain, odors tend to linger in shoes worn for long periods.

"Karatto Hero Legend" blends B-type silica gel, which excels in humidity control, with silica gel specialized in odor adsorption, in an original formulation. Like the previous model, it is designed to address both moisture and odor.

Improved Size for Easier Use with Rain Boots and Regular Boots

Responding to feedback from previous users, the "Karatto Hero Legend" has been improved in size to approximately 1.2 times larger than the previous model, while firmly increasing the internal material and refining the design to fit various shoe shapes without forcing.

It has become easier to incorporate into the care of rain boots during the rainy season, daily leather shoes, work shoes used for outdoor work, and various other types of shoes.

Product Information

[Product Name]

Shoshu Onsite Karatto Hero Legend

(Set of 2)

・Body size: approx. 260×Φ45(mm)

・Handle size: 10×140(mm)

・Weight: approx. 190〜195g

・Scheduled general sale price: 6,600 yen (tax included, 2 pieces)

・Body colors: Khaki, Brown

Project Overview

For this project, we also offer an early shipping plan that arrives before the rainy season and Father's Day. As a practical item for daily shoe care, it is an easy choice for personal use as well as a Father's Day gift.

Project name: [Upgraded with approximately double the content!] Adult Dehumidifier and Deodorizer | Karatto Hero Legend
Implementation period: Starts April 30, 2026 (Thursday) 12:00 PM - Ends June 14, 2026 (Sunday) 10:00 PM
Location: New product crowdfunding service "Makuake"
Project URL: https://www.makuake.com/project/karatto-hero-legend/
Delivery time: Scheduled for late May shipment *For early shipping plan

About Yamajin Yakuhin Co., Ltd.

Yamajin Yakuhin Co., Ltd. is a silica gel desiccant manufacturer founded 70 years ago, with its headquarters in Shiga Prefecture.

Pharmaceutical silica gel drying.