[World's First] Hokuto x Sunpro's Seriously Conceived "Mushroom-built House" to be Released on April 1, 2026

Sunpro Co., Ltd. (Headquarters: Shiojiri City, Nagano Prefecture, Representative Director: Hiroaki Aoyagi) is pleased to announce that in collaboration with Hokuto Corporation (Headquarters: Nagano City, Nagano Prefecture, Representative Director: Masayoshi Mizuno), it has successfully developed the ultimate anti-aging home, the "Mushroom-built House (Kinokozo Jutaku)," and will begin limited sales on April 1, 2026.

*Please note that the sale and some functions of the "Mushroom-built House" in this announcement are April Fool's fiction, but the underlying housing performance of both companies and the mushroom ingredients/research results are based on facts.
Click here for the April Fool's special page ▶ https://sunpro36.co.jp/blog/16753/

■ What is the "Mushroom-built House"?
This project is a groundbreaking endeavor that integrates Sunpro's long-standing quest for the "ultimate anti-aging home" with Hokuto's cutting-edge mushroom research technology. It incorporates the following advanced technologies to help residents live youthfully and healthily, overcoming the harsh natural environment of Shinshu.

■ "Mushroom-built House" - Amazing Housing Performance
Elasticity Grade 7+ "Eryngii Muscle Construction Method"
Mycelial Power Generation
Ultimate Passive Design Achieved with Mushrooms
Premium Moisturizing Spore Air Conditioner
Mushrooms Growing from Walls!? Mycelial Insulation Material
Hokuto-supervised Mushroom Cultivation Pantry

|Architect's Vision
Sunpro Architect Isao Hiraishi
Isao Hiraishi, Architect, Sunpro Co., Ltd.
My specialty is flexible spatial design using 'curved walls.'
The ultimate form of this was the mushroom's golden ratio in nature.
By directly incorporating the strong elasticity and vitality unique to Eryngii mushrooms into the architectural structure, we have completed the ultimate home that can withstand the Shinshu environment. We promise surprise and emotion in home building with this Mushroom-built House.

|Expert Opinions
Professionals in various fields also highly evaluate the performance of the "Mushroom House" from an academic perspective.
Kenji Ouchi, Development Research Department, Hokuto Corporation
Kenji Ouchi, Development Research Department, Hokuto Corporation
I have been researching the health benefits of ergothioneine, a component found in mushrooms, for many years.
I am truly surprised that the era has come where we can directly bathe in ergothioneine spores from air conditioning equipment.
This is truly a monumental invention, extending the infinite potential of mushrooms—elasticity, moisturizing, and self-generation—to living spaces. In particular, the function of mushroom caps expanding and contracting according to the season is wonderful!

Atsushi Iwamae, Head of Umwelt Architectural Research Institute Co., Ltd.
Atsushi Iwamae, Head of Umwelt Architectural Research Institute Co., Ltd.
Humans coexist with trillions of bacteria, far exceeding the number of cells that make up the human body, and live their daily lives.
This collaboration between Sunpro, a company gaining attention in the housing industry, and Hokuto, which has established a solid world in the realm of fungi, for anti-aging initiatives, I believe, will be a major turning point for Japan's housing and mushroom industries.
Decay fungi, which rot wood, are a type of mushroom. To utilize them in housing is a very significant trial as one of humanity's ultimate attempts to realize a circular society.
At the same time, I think it is a good example showing that there is still hope and excitement in this world.
As a researcher, I have high expectations for the Mushroom-built House.

|Client's Voice
Eryngii-sama of Kinoko-gumi
Eryngii-sama of Kinoko-gumi
"I'm so happy! I've always wanted to live in a house like this!"

■ Limited release of 3 units for delivery in 2050.
The "Mushroom-built House" is 100% self-sufficient in household electricity and improves insulation performance over time.
It can truly be called an innovative form of housing aimed at achieving carbon neutrality by 2050. Although it is the ultimate anti-aging home packed with cutting-edge mushroom technology, both companies' strong desire to deliver this excitement to as many people as possible has led to an astonishing special price.

The price is a special price, with a wish for the realization of carbon neutrality in 2050.
[Limited to the first 3 units: 20.5 million yen (tax included)]

■ About the Prize Campaign
[Campaign Overview]
In conjunction with the release of this project, a campaign will be held where 10 winners will be selected by lottery from applicants via the special website to receive a "Hokuto-selected! Factory-direct Fresh Mushroom Set."
Additionally, all those who follow Sunpro and Hokuto's SNS accounts and post on SNS with the hashtag "#茸造住宅で菌活" will receive special collaboration goods for this project.

[Target Accounts]
Share on Instagram ▶ Sunpro account (@sunpro_style) Hokuto (@hokto_official)
Share on X ▶ Sunpro account (@sunpro_pr) Hokuto (@hokto_official)