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Ikuma Watase's Itomachi Hotel 0 Interior presents a hospitality reception environment characterized by a striking curved reception desk fabricated from white terrazzo embedded with dark gray and burgu
Ikuma Watase's Itomachi Hotel 0 Interior presents a hospitality environment where soft celadon and pale sage hues establish a contemplative chromatic foundation, their desaturated tonalities evoking t
Warm natural timber millwork rises along the left wall of Ikuma Watase's Itomachi Hotel 0 Interior, establishing an immediate dialogue between craft tradition and contemporary spatial refinement, wher
A tiered cascading water feature fabricated from polished charcoal-toned stone occupies the immediate foreground, its geometric hexagonal basins arranged in descending levels that create rhythmic repe
Crystalline waters surge over rust-tinged riverbed stones in dynamic diagonal movement through this overhead composition, where natural geological forms create a symphonic arrangement of texture, colo

Ikuma Watase

Iron Interior Space and Exhibition Design · 2025

Itomachi Hotel 0 Interior

by Ikuma Watase

  • A' Design Award 2025 Iron Winner in Interior Space and Exhibition Design
  • Awarded April 15, 2025
  • CLIENT: Ikuma Watase
  • Estimated Number of Design Views: 8,551
  • Verification code 31E803CFDD · Verify this award
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About Itomachi Hotel 0 Interior

Itomachi Hotel 0 is a hotel interior and landscape design located in Saijo, Japan. The hotel uses solar power systems and ecological materials, and is the first hotel in Japan certified as a Net Zero Energy Building. The design is based on two local resources, Uchinuki groundwater drawn from wells and Iyo Blue Stone. Each guest room has an open washbasin facing the entrance, and Uchinuki is also placed in the central courtyard, so the sound of water is heard throughout the hotel. The design supports the revitalization of the town.

Ikuma Watase's Itomachi Hotel 0 Interior engages the evolving discourse surrounding material authenticity and spatial warmth within contemporary hospitality design, positioning itself within a lineage of minimalist interiors that seek to humanize geometric rigor through the strategic deployment of natural materials and organic formal gestures. The reception area demonstrates sophisticated compositional intelligence through its asymmetrical yet balanced arrangement, where the sweeping curve of the terrazzo reception desk establishes a dynamic counterpoint to the vertical timber element that rises behind it, creating visual tension and resolution simultaneously. The terrazzo itself merits particular attention for its accomplished surface treatment, the white matrix embedded with carefully proportioned dark gray and burgundy aggregate creating a speckled visual texture that recalls Italian craft traditions while suggesting contemporary interpretations of classic material vocabularies, the aggregate distribution appearing random yet visually balanced, demonstrating skilled fabrication and thoughtful material specification. The hexagonal floor tiling in saturated teal establishes a bold chromatic foundation that elevates the entire palette from neutral minimalism toward a more nuanced and memorable color story, the geometric tessellation creating visual rhythm and directing circulation pathways while providing textural interest that rewards close observation. The vertical timber feature demonstrates notable structural audacity in its cantilevered projection, the warm honey-toned wood veneer introducing organic material presence and haptic warmth into an otherwise cool palette of stone and painted surfaces, its grain figuration providing subtle visual movement and naturalistic variation that contrasts productively with the uniform manufactured surfaces surrounding it. The blue-gray mosaic wall treatment functions as a middle-scale textural transition between the bold terrazzo foreground and the smooth white background, its grid pattern creating visual unity with the hexagonal floor while maintaining distinct material identity, suggesting attention to detail across multiple scales of perception from immediate tactile encounter to distant spatial reading. The lighting strategy reveals sophisticated understanding of atmospheric construction, the diffused natural daylight filtered through sheer curtains combining with recessed and cove lighting to eliminate harsh shadows and create an even, welcoming luminosity that enhances material colors and textures without introducing dramatic contrast or directional emphasis. This work invites consideration of how contemporary hospitality environments might achieve distinction and warmth through material craftsmanship and compositional thoughtfulness rather than through decorative elaboration or stylistic historicism, suggesting that spatial generosity, material authenticity, and geometric clarity can combine to create environments that feel both professionally refined and genuinely welcoming. The design appears to ask viewers to contemplate the relationship between natural and manufactured materials, between organic curves and rectilinear geometry, between visual boldness and spatial serenity, ultimately proposing that these apparent oppositions might be reconciled through careful calibration and sensitive material orchestration, creating hospitality spaces that honor both functional efficiency and human comfort, both contemporary aesthetic sensibilities and enduring material traditions.

Press Kit

Unique Properties
Itomachi Hotel 0 is a zero-energy hotel that has adopted solar power systems and ecological materials, making it the first in Japan to obtain Net Zero Energy Building(ZEB) certification. The design is based on local cultural and environmental resources, specifically Uchinuki (groundwater from well) and Iyo Blue Stone, with the goal of creating a foundation for the revitalization of the town as a symbol of Saijo.
Dimensions & Packaging
In this project, it was possible to propose not only the interior design but also the landscape design as a unified concept.
Therefore, Uchinuki was placed not only in the guest rooms but also in the center of the courtyard, planned so that the sound of water always echoes throughout the hotel.
The color scheme was based on the use of light and dark tones of stone in each space.
All guests to allways experience the local character and charms of Saijo wherever they are in the hotel.
Tags
Hotel, interior, landscape, sustainable, recycling, Renewable Energy, Net Zero Energy Building, SDGs
Production Technology
The layout of the guest rooms was centered around Uchinuki. Each guest room features an open-format washbasin directly across from the entrance, creating a symbolic that evokes the abundant water resources.
The villa type has an open-air bath with natural hot spring water that comes from a deeper stratum than Uchinuki. Guests can experience cold and hot types of water, which is a rare environmental resource of Saijo.
Design Challenge
Japan is facing a serious population decline, particularly in rural areas where urban decay is evident through the increasing number of vacant houses and abandoned farmland. Saijo is experiencing similar challenges, and the project owner, originally from Saijo, was seeking solutions.
In response, we thought that by designing the hotel based on Uchinuki and Iyo Blue Stone, guests could experience the charm of Saijo, and the hotel could serve as a symbol for the revitalization of the town.
Project Duration
The project started in November 2021 in Ehime,Japan and finished in March 2024, and ITOMACHI HOTEL 0 was opened in May 2024.
Operation Flow
we proposed ecological design that combines natural resources such as Uchinuki and Iyo Blue Stone with sustainable materials made from recycled glass and fibers, as well as traditional local crafts like washi paper and ceramics.
This hotel is committed not only to maintaining the environment during its construction but also to contributing to job creation for local residents and increasing the town's revenue, thereby supporting the revitalization of the community for years to come.
Research
Saijo does not have tourist attractions like those found in Tokyo or Kyoto. However, it boasts a pleasant climate and a rich rural landscape nestled between mountains and the sea, making it an ideal location for urban workers seeking workation opportunities and for people living in nearby cities for a second home.
Therefore, we planed kitchen and co-working space, rare for hotels.
As a result, the hotel is used by many business guests who aim to "spending time in this town, at this hotel".
Inspiration
The region utilizes underground water from wells called "Uchinuki," unique to the area due to the local terrain, and there is no conventional water supply system as found elsewhere in Japan. This water is very clean and can be consumed directly.
The area is also known for producing "Iyo Blue Stone," which has a bluish-green hue with white stripes. The stone changes from a light tone when dry to a darker tone when wet.
These two unique resources were used as design keywords for the design.
Image Credits
Image#1-5: Photographer Yoshiro Masuda,2024.

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