Mitsubishi Jisho Design and Panasonic Electric Works Co., Ltd. Jointly Develop Domestic Timber Lattice Louvers to Enhance System Ceiling Design
Mitsubishi Jisho Design and Panasonic Electric Works have jointly developed "Domestic Timber Lattice Louvers" that can be integrated into system ceilings, easily realizing timber-rich spaces, combining design and seismic resistance. This new product promotes the use of wood in urban architecture.
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- 📰 Published: April 24, 2026 at 22:00
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Mitsubishi Jisho Design Inc. (Head Office: Chiyoda-ku, Tokyo; President and CEO: Junichi Tanizawa; hereinafter, Mitsubishi Jisho Design) has jointly developed "Domestic Timber Lattice Louvers" with Panasonic Electric Works Co., Ltd. (Head Office: Minato-ku, Tokyo; Representative Director, President, and CEO: Kiyoshi Otaki; hereinafter, Panasonic EW). These louvers can be integrated into system ceilings to create timber-rich spaces. Moving forward, the companies will promote proposals and installations in various projects, while also refining the product for commercialization and establishing sales channels.
Image of Domestic Timber Lattice Louver installation
Amidst the promotion of timber utilization in the architectural field, there is a particular demand for new ways to use wood in urban architecture. Today, the design of office spaces, which are at the core of urban architecture, is shifting towards creating environments that emphasize creativity, improved communication, and user well-being. However, the commercialization of effective ceiling design materials to create such "new offices" has not progressed sufficiently.
Against this backdrop, Mitsubishi Jisho Design, leveraging its long-standing expertise in timber utilization and ceiling design, combined with Panasonic EW's knowledge of highly constructible and renewable system ceiling materials and lighting, particularly for large-scale office buildings, jointly developed the "Domestic Timber Lattice Louver" (patent pending).
A key feature of this product is its compatibility with system ceilings, allowing for easy and aesthetically pleasing integration of domestic timber into building interiors. Furthermore, by implementing an appropriate lighting plan in conjunction with the domestic timber lattice louvers, it creates a natural three-dimensional effect on the ceiling and provides a lighting environment suitable for the space's intended use. Additionally, by using dedicated mounting hardware, this product ensures the seismic resistance required for system ceilings, even while incorporating natural wood.
Mitsubishi Jisho Design proposes this product as a new option for timber construction and wood-based elements, enabling the utilization of wood in a wider range of buildings and spaces. Through continued co-creation with Panasonic EW, the companies aim to contribute to sustainable space creation and expand its application to diverse uses, including offices.
■ Product Features
1. Easy realization of highly designed ceilings with domestic timber, even in system ceilings
The "Domestic Timber Lattice Louver" was developed as a wooden unit that can be easily incorporated into the widely used grid-type system ceilings. Since it can be installed using standardized system ceiling components (T-bars), a timber-textured ceiling design can be achieved without extensive substructure work.
This allows for the expression of the unique texture and rhythmic feel of wood, while leveraging the strengths of system ceilings: high renewability and constructibility. It offers new design options for system ceilings, which traditionally had limited design freedom. Moreover, with a simple structure and details, ease of assembly and installation has been improved. This makes it a specification that is easy to introduce into large-scale spaces such as offices.
Composed of wooden lattice louvers and lighting that can be incorporated into the system ceiling frame
2. Provides a lighting environment suitable for the space's intended use when combined with lighting design
Proposals for the "Domestic Timber Lattice Louver" in new construction design and renovations will be made in conjunction with lighting design by Panasonic EW. Lighting fixtures, distribution methods, irradiation positions, and color temperatures will be comprehensively considered according to the shape, dimensions, and intended use of the domestic timber lattice louvers and the space. This achieves an appropriate lighting environment while highlighting the expression of wood.
Anticipated use in combination with various lighting fixture installation patterns
3. Ensures the seismic resistance required for system ceilings, even with natural wood, through dedicated mounting hardware
Aiming to "safely and securely introduce wood into architecture," the design meets the seismic standards set by Panasonic EW. To meet these standards, new dedicated mounting hardware for system ceilings has been developed. By creating a structure that integrally fixes the domestic timber lattice louvers and the system ceiling T-bars, it can secure seismic resistance equivalent to that of conventional system ceilings, even in skeleton specifications without ceiling panels.
Mounting hardware securely fixes domestic timber lattice louvers and T-bars
■ Future Implementation Schedule
Hosen Gakuen 100th Anniversary Project "Hosen Hyakunenkan The Terrace"
(Owner: Hosen Gakuen Educational Institution; Design: Mitsubishi Jisho Design)
A school building reconstruction project currently underway in Tokyo. Domestic timber lattice louvers will be introduced into the library of the new building, where special classrooms are consolidated, to create a timber ceiling. Underneath the timber ceiling, furniture will be provided for free reading and studying, and the soft light reflected from the wooden panels will create an environment that nurtures the sensibilities and sentiments of children and students. Scheduled for completion in 2028.
Exterior image
Interior image
*Images are based on current plans and are subject to detailed review in the future.
Image of Domestic Timber Lattice Louver installation
Amidst the promotion of timber utilization in the architectural field, there is a particular demand for new ways to use wood in urban architecture. Today, the design of office spaces, which are at the core of urban architecture, is shifting towards creating environments that emphasize creativity, improved communication, and user well-being. However, the commercialization of effective ceiling design materials to create such "new offices" has not progressed sufficiently.
Against this backdrop, Mitsubishi Jisho Design, leveraging its long-standing expertise in timber utilization and ceiling design, combined with Panasonic EW's knowledge of highly constructible and renewable system ceiling materials and lighting, particularly for large-scale office buildings, jointly developed the "Domestic Timber Lattice Louver" (patent pending).
A key feature of this product is its compatibility with system ceilings, allowing for easy and aesthetically pleasing integration of domestic timber into building interiors. Furthermore, by implementing an appropriate lighting plan in conjunction with the domestic timber lattice louvers, it creates a natural three-dimensional effect on the ceiling and provides a lighting environment suitable for the space's intended use. Additionally, by using dedicated mounting hardware, this product ensures the seismic resistance required for system ceilings, even while incorporating natural wood.
Mitsubishi Jisho Design proposes this product as a new option for timber construction and wood-based elements, enabling the utilization of wood in a wider range of buildings and spaces. Through continued co-creation with Panasonic EW, the companies aim to contribute to sustainable space creation and expand its application to diverse uses, including offices.
■ Product Features
1. Easy realization of highly designed ceilings with domestic timber, even in system ceilings
The "Domestic Timber Lattice Louver" was developed as a wooden unit that can be easily incorporated into the widely used grid-type system ceilings. Since it can be installed using standardized system ceiling components (T-bars), a timber-textured ceiling design can be achieved without extensive substructure work.
This allows for the expression of the unique texture and rhythmic feel of wood, while leveraging the strengths of system ceilings: high renewability and constructibility. It offers new design options for system ceilings, which traditionally had limited design freedom. Moreover, with a simple structure and details, ease of assembly and installation has been improved. This makes it a specification that is easy to introduce into large-scale spaces such as offices.
Composed of wooden lattice louvers and lighting that can be incorporated into the system ceiling frame
2. Provides a lighting environment suitable for the space's intended use when combined with lighting design
Proposals for the "Domestic Timber Lattice Louver" in new construction design and renovations will be made in conjunction with lighting design by Panasonic EW. Lighting fixtures, distribution methods, irradiation positions, and color temperatures will be comprehensively considered according to the shape, dimensions, and intended use of the domestic timber lattice louvers and the space. This achieves an appropriate lighting environment while highlighting the expression of wood.
Anticipated use in combination with various lighting fixture installation patterns
3. Ensures the seismic resistance required for system ceilings, even with natural wood, through dedicated mounting hardware
Aiming to "safely and securely introduce wood into architecture," the design meets the seismic standards set by Panasonic EW. To meet these standards, new dedicated mounting hardware for system ceilings has been developed. By creating a structure that integrally fixes the domestic timber lattice louvers and the system ceiling T-bars, it can secure seismic resistance equivalent to that of conventional system ceilings, even in skeleton specifications without ceiling panels.
Mounting hardware securely fixes domestic timber lattice louvers and T-bars
■ Future Implementation Schedule
Hosen Gakuen 100th Anniversary Project "Hosen Hyakunenkan The Terrace"
(Owner: Hosen Gakuen Educational Institution; Design: Mitsubishi Jisho Design)
A school building reconstruction project currently underway in Tokyo. Domestic timber lattice louvers will be introduced into the library of the new building, where special classrooms are consolidated, to create a timber ceiling. Underneath the timber ceiling, furniture will be provided for free reading and studying, and the soft light reflected from the wooden panels will create an environment that nurtures the sensibilities and sentiments of children and students. Scheduled for completion in 2028.
Exterior image
Interior image
*Images are based on current plans and are subject to detailed review in the future.