Introducing arietta HIRAYA: The New Holistic Housing Solution for Modern Living

Launch of arietta HIRAYA by LIXIL Housing Research Institute

LIXIL Housing Research Institute's Fiase Home Company is set to unveil its innovative new product, arietta HIRAYA, on January 17, 2026. This cutting-edge single-story home is designed to merge high airtightness and thermal insulation characteristics with passive design principles, ultimately promoting a well-being living experience. The homes will be available through Fiase Home franchises nationwide, except in select regions.

The increasing demand for single-story homes is driven by Japan's aging population and the evolving lifestyles of child-rearing families. Amidst fierce price competition and design differentiation in the market, Fiase Home stands firm on its motto: "The best comfort for living." The company emphasizes the health and mental harmony of its residents through thoughtful product development.

Target Audience and Concept

The arietta HIRAYA is specifically crafted for families in their 40s, particularly those who balance parenting and working. Recognizing that homes are spaces where people spend a significant part of their lives, this product addresses the growing need for physical and mental wellness and quality time. The guiding principle of this innovative dwelling is encapsulated in the concept of "HOLISTIC na HIRAYA". This approach focuses on optimizing the balance of three key elements: Mind, Body, and Nature.

1. Mind: Creating a Space for Peace

The design incorporates unique features such as a sauna and a fire pit, which aim to generate a tranquil, resort-like ambience at home. Thoughtful pathways lead directly from the sauna through a mudroom to the bathroom, and connect to a wood deck that merges with the garden. This layout promotes a rejuvenating experience right at home, blending everyday life with moments of relaxation.

2. Body: A Healthy Living Environment

Central to arietta HIRAYA is the superior air quality created by Fiase Home's proprietary e-panel technology, which ensures a high level of airtightness and thermal insulation. The home incorporates a 24-hour energy recovery ventilation system combined with an entire house HVAC system, efficiently regulating the indoor climate. One air conditioning unit can uniformly maintain the entire home at a comfortable temperature, significantly reducing the risks of heat-related illnesses like heat shock and heat stroke.

3. Nature: Emphasizing Passive Design

The design maximizes natural elements, making use of sunlight and ventilation through passive architecture. Interior finishes include natural wood veneer flooring and patterned timber ceiling, providing a harmonious connection with nature. This approach not only enhances the aesthetic appeal of the home but also satisfies tactile and visual comfort.

Nationwide Viewing Event and Consultation

To celebrate the launch of the arietta HIRAYA, a nationwide viewing and consultation event will run from January 17 to February 8, 2026, at Fiase Home franchises. This will provide potential homeowners the chance to experience the actual building's design and lifestyle, highlighting the allure of living with a sauna and a fire pit.

Overview of arietta HIRAYA

- Product Name: arietta HIRAYA
- Release Date: January 17, 2026
- Availability: Nationwide through Fiase Home franchises (excluding certain regions)
- Base Price Options:

33-tsubo plan (Area: 109.72 m²): ¥29,950,000 (excl. tax)
26-tsubo plan (Area: 85.7 m²): ¥24,280,000 (excl. tax)
(Note: Prices reflect the cost of the main building and exclude solar, batteries, wood decks, sauna, and exterior construction fees.)

Key Features

Concept: HOLISTIC na HIRAYA

The design revolves around themes of harmony among mind, body, and nature, enhancing residents' well-being.

Unique Equipment

- Air Conditioning/Ventilation: A 24-hour energy recovery ventilation system combined with underfloor heating/cooling ensures clean air and uniform temperature.
- Hot Water: The micro-bubble eco-cute not only provides warmth during baths but also promotes relaxation and skin hydration.
- Exterior/Internal Finish: Materials chosen prioritize both maintenance and aesthetics.
- Energy Generation: Solar power systems and battery backups support a sustainable, disaster-resilient lifestyle.

Lifestyle Offerings

The plans include optional features addressing hobbies and family time, such as home saunas, fire pits, and layouts that promote interaction.

Design Highlights

The arietta HIRAYA is designed for seamless connectivity between indoor and outdoor spaces, allowing for a variety of family activities like resting, conversing, relaxing, and sleeping. Key elements such as mudrooms and terraces that connect to large communal areas promote a comfortable, grounded lifestyle that respects humans and the environment.

About Fiase Home

Fiase Home aims to provide quality residences with lasting value and aspires to make special living experiences commonplace. Their vision actively confronts environmental issues like global warming, enhancing the basic performances of homes while employing passive designs that optimize natural resources like light and wind to deliver safe, comfortable, and eco-friendly living.