NEWS

NEWS RELEASE

2026.04.24

Domestic wooden lattice louvers enhance the aesthetic appeal of the system ceiling.
Developed in collaboration with Panasonic Electric Works Co., Ltd.

Download the release here.

Mitsubishi Jisho Design Inc., Ltd. (Head Office: Junichi Tanisawa ku, Tokyo; Director & CEO: Junichi Tanizawa; hereinafter referred to as Mitsubishi Jisho Mitsubishi Jisho Design) has jointly developed a "domestically produced wooden lattice louver" with Panasonic Electric Works Co., Ltd. (Head Office: Minato Minato City, Tokyo; Director & CEO: Kiyoshi Otaki; hereinafter referred to as Panasonic EW). Moving forward, they will promote proposals and introductions for various projects, as well as work on refining the product and establishing sales channels for commercialization.

Installation image of domestically produced wooden lattice louvers

As the use of wood in architecture is promoted, there is a growing need for new ways to utilize wood, particularly in urban architecture. Today, the design of office spaces, which can be considered the core of urban architecture, is changing towards creating spaces that prioritize creativity, communication, and user well-being. However, the commercialization of effective ceiling design materials to create these "new offices" has not progressed sufficiently.

Against this backdrop, Mitsubishi Jisho Design has combined its long-cultivated expertise in wood utilization and ceiling design with Panasonic EW's expertise in system ceiling materials and lighting that offer high installability and refurbishment, particularly in large-scale office buildings, to jointly develop the "Domestic Wood Lattice Louver" (patent pending).

 

This product is characterized by its ability to easily and aesthetically incorporate domestically produced timber into building interiors by being compatible with system ceilings. Furthermore, by implementing an appropriate lighting plan tailored to the domestically produced timber lattice louvers, it brings a natural three-dimensional effect to the ceiling and provides a lighting environment suitable for the intended use of the space. In addition, by using dedicated mounting hardware, this product ensures the seismic resistance standards required for system ceilings, even while utilizing natural wood.

Mitsubishi Jisho Design proposes this product as a new option for wood construction and wood-based materials, enabling the use of wood in a wider range of buildings and spaces. Moving forward, we will continue to contribute to the creation of sustainable spaces through co-creation with Panasonic EW, and aim to expand its use to diverse applications, including offices.

■ Product Features

1. Easily create highly aesthetic ceilings using domestically produced timber, even with a modular ceiling system.
" "Domestic wood lattice louvers" It was developed as a wooden unit that can be easily incorporated into the grid-type system ceilings that are widely used today. Standardized system ceiling components (T Because it can be installed using a bar, it is possible to achieve a wood-like ceiling design without requiring extensive substructure work.

This design leverages the strengths of modular ceilings—their ease of renewal and installation—while enabling the use of wood to create textured and rhythmic expressions. It offers new design options for modular ceilings, which previously had limited design freedom. Furthermore, the simple structure and details make assembly and installation easy. This makes it easy to implement in large spaces, including offices.

It consists of wooden lattice louvers and lighting that can be integrated into the frame of a system ceiling.

2.By combining with lighting design, we can provide a lighting environment suitable for the intended use of the space.
Our proposals for "domestically produced wooden lattice louvers" in Architectural Design and Renovation are carried out in conjunction with lighting design by Panasonic EW. We comprehensively consider lighting fixtures, their placement, illumination position, and color temperature, taking into account the shape and dimensions of the domestically produced wooden lattice louvers, as well as the intended use of the space where they will be installed. This ensures that the appropriate lighting environment is achieved while highlighting the natural beauty of the wood.

It is intended to be used in combination with various lighting fixture installation patterns.

3. By using dedicated mounting brackets, the seismic resistance standards required for system ceilings are ensured while utilizing natural wood.
Aiming to "introduce wood safely and securely" into architecture, the design meets the seismic standards set by Panasonic EW. To meet these standards, we have newly developed mounting brackets specifically for system ceilings. By creating a structure that integrally fixes the domestic wood lattice louvers and the T-bars of the system ceiling, we can ensure the same load-bearing capacity as a regular system ceiling, even in a skeleton specification without ceiling panels.

The mounting bracket securely fastens the domestically produced wooden lattice louvers and T-bars.

■ Future implementation plans

Hosen Gakuen 100th Anniversary Project "Hosen Hyakunenkan The Terrace"(Client: Hosen Gakuen Educational Corporation, Architect: Mitsubishi Jisho Design)
 A school building reconstruction project is underway in Tokyo. In the new building's library, where special classrooms will be consolidated, domestically produced wooden lattice louvers will be installed to create a wooden ceiling. Beneath the wooden ceiling, furniture will be provided for students to freely read and study, and the soft light reflected off the wooden panels will create an environment that nurtures the sensitivity and emotional development of the children and students. Completion is scheduled for 2028.

Appearance image
Interior image
*The image is based on the current plan and may change after further detailed consideration.

■Company Overviews

Panasonic Electric Works Co., Ltd.
 Location: Higashi-Minato City-ku, Tokyo 1-5-1 Panasonic Tokyo Shiodome Building
Representative: Kiyoshi Otaki Director and CEO
Business Description: We operate in the field of electrical equipment, providing services for all kinds of "living spaces" that make up society, including homes, offices, hotels, commercial facilities, and sports facilities.
URL: https://panasonic.co.jp/ew/

Mitsubishi Jisho Design Inc.
 Location: Marunouchi, Chiyoda-ku, Tokyo 2-5-1 Marunouchi 2 Chome Building
Representative: Junichi Tanisawa Director
Business Description: An architectural design firm that handles architectural and civil engineering design and Construction Supervision, Renovation work, urban and regional development-related work, and various consulting services.
URL: https://www.mjd.co.jp/
[Introduction to related departments]
Wood Construction Lab
The Wood Architecture Lab within Mitsubishi Jisho Design R&D Promotion Department is a specialized organization that consolidates knowledge of wood and wood-based architecture scattered throughout the company, connecting it to social implementation from both research and design perspectives. Rather than making the use of wood an end in itself, it emphasizes "the right material in the right place," taking into account its performance, structure, and expression. It advocates "X WOOD," a concept that combines wood with various elements of cities and buildings, not just structural and interior materials. Working in collaboration with various companies within Mitsubishi Estate Group and material and technology partners, it expands the possibilities of wood and envisions a better landscape of cities and living spaces.

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