WEAZER NISHIIZU KAI

The Next Generation

WEAZER Nishi-Izu — the first prototype — demonstrated that off-grid living could be both innovative and viable, earning recognition and maintaining strong occupancy.

Within the same Funayama hamlet, we discovered a site of even greater natural beauty — the stage for our evolution.

An Incomparable Site

Five minutes’ walk from the first WEAZER, this site offers sweeping ocean views, a V-shaped gorge below, waves audible in the distance.
A path leads to a secluded stretch of coastline — rare beauty offering complete solitude.

Facing south, a stream winds through the property, revealing ocean, mountains, forest — a convergence of landscapes.
The stream, mostly dry, awakens when rain falls, adding living rhythm to the space.

From Modular to Crafted

The first WEAZER prioritized mobility through modular design.
This next generation takes a different approach:
site-built architecture crafted to embrace its extraordinary surroundings.

Designed by SUPPOSE DESIGN OFFICE — known for fusing Japanese tradition with contemporary sensibility.
Within a 1,000㎡ site stands a 150㎡ residence.
A sanctuary. One group per day.
Rare privacy and quiet abundance.

Facing the sea, a reflecting pool holds a tatami-lined meditation space.
Yoga immersed in natural sounds.
Time detaches from the everyday.
Deep stillness. Presence.

A sauna offers renewal amid waves and birdsong — finding alignment with nature itself.

Further Evolution — Off-Grid Technology

WEAZER’s defining feature: complete self-sufficiency.
All electricity and water generated from natural energy — sun, rain, heat.

This generation advances both hardware and software.

1. Hardware: Thermal-Centric Energy

When people hear “energy,” they think “electricity.”
Electricity travels distances easily, connecting cities and power plants — the backbone of urbanized society.

Yet daily electricity mostly produces heat:
air conditioning, hot water, cooking.
Meanwhile, enormous ambient heat — from ground, hot springs, household exhaust — goes unused. Wasted.
This imbalance has persisted for decades.

WEAZER transforms this paradigm.
Local energy production and consumption.
Independent of external infrastructure.
Sunlight, rain, heat—harvested and reused on-site.

Central to this: “Heat Circulation”—
ARTH’s thermal recycling system.
It captures waste heat from daily life:
hot drain water, HVAC exhaust, fireplace warmth.
Repurposed for heating, cooling, hot water.

By circulating energy conventional homes discard, electricity use drops dramatically.
Nearly three times the efficiency of typical buildings.

The breakthrough: Dual-Source Air Conditioning.

Conventional AC uses only air for heat exchange.
Water-cooled systems use natural thermal sources:
waste hot water for heating, groundwater or rainwater for cooling.
Far greater efficiency.

WEAZER’s dual system switches automatically — air or water, based on season and demand.
Normal conditions: around 70% uses efficient water operation.
Peak loads: air cooling supplements as needed.
Dramatically boosts overall performance (COP).

Like a hybrid vehicle — electric for efficiency, gas for high loads.

WEAZER’s “two hearts”—air and water — work in concert.
High efficiency. Flexible adaptation.

This dramatically enhances off-grid resilience.
Thanks to thermal recirculation and dual-source AC, even high-energy features like saunas operate completely off-grid.

Through integrated energy management — hardware and software harmonized — WEAZER delivers sustainable, self-sufficient living that is also profoundly comfortable.

2. Software: AI-Controlled Off-Grid HEMS

On the software side, a major leap forward.

Conventional HEMS simply visualize energy use.
In fully off-grid environments, monitoring isn’t enough.
True autonomy requires intelligence.

ARTH’s proprietary Off-Grid HEMS:
AI actively manages energy.
Analyzes real-time data — weather forecasts, guest profiles, historical consumption.
Predicts future generation and demand.

When limited sunlight or high usage is anticipated, AI optimizes instantly — adjusting HVAC, scheduling hot water,
managing battery reserves.
Balancing comfort with resource preservation.
Preventing shortages before they occur.

The interface has also evolved.
Beyond showing generation and consumption, it visualizes how sustainably one is living.
Guests understand their environmental impact intuitively.
Eco-conscious living becomes engaging, rewarding — not constraining.

WEAZER’s Off-Grid HEMS:
more than a control platform.
The intelligent core of next-generation living.
An AI system that anticipates, learns, harmonizes human life with Earth’s natural rhythms.

Destination Stay

WEAZER Nishi-Izu KAI introduces a new concept:
Destination Stay—where the stay itself is the destination.

Most accommodations: 3pm check-in, 11am checkout.
After sleep and meals, time spent experiencing the architecture is brief.

At WEAZER Nishi-Izu KAI, one group per day.
The entire site. Completely private.
Designed to be lived in, not just visited.
Architecture, gardens, sauna, landscape — experienced freely, unconstrained by time.

The sea shifts color with hours and seasons.
Birdsong and wave rhythm blend with wind.
To dwell in these moments, feeling nature through all senses — this is the truest luxury.

WEAZER Nishi-Izu KAI:
where architecture, nature, and technology converge.
A stay both profound and timeless.
An experience existing nowhere else.