Under the main concept "Bhumipiman – the Land of Immunity", Thailand Pavilion at the World Expo 2025 in Osaka, Japan will connect with the world so that everyone can experience the Thai "Bhumi" through the atmosphere of a land rich in resources, and a way of life that helps build immunity, enabling Thai people to be healthy both in body and mind. This building showcases Thailand's potential, from past to present, forging strong and sustainable connections with the wider world into the future.

The architectural design showcases Thainess through the use of subtle elements that create a relaxing atmosphere for visitors, as well as a fun, comfortable, and relaxing exhibition experience, evoking the feelings that mirror the memories shared by most people when they visit Thailand.

With the aim to create a design that embodies and clearly communicates Thai cultural identity in a way that is recognizable by people around the world, elements of ancient Thai architecture were applied, such as the “Chom Hae” traditional-styled high slope pitched roof, with its characteristic multi-layered design. Dimensions were reduced to decrease the size of the architectural elements. A motif pattern mimicking woven rattan webbing is used to express the connection between beliefs and wisdom of the Thai people, while colors and materials were carefully selected to reflect the subtleties of Thai design.

Located in the Connecting Lives zone of the Expo Master Plan, Plot Site-A13 of the Thailand Pavilion is a rectangle with narrow front proportions and a depth of over a hundred meters. Therefore, the building was designed as a half-gable flanking a high reflective wall that runs the entire length of the plot. This technique creates an illusion of a complete pavilion with a gable roof when viewed from the main approach in the Main Line of Flow. This reflection invites visitors into the Thailand Exhibition Hall, through an atmosphere of medicinal plants, from the courtyard to the interior exhibition space, workshop area, souvenir shop, and Thai cuisine booths, continuing to exit the rear of the building where visitors can enjoy a view of the Forest of Tranquility, a large forest park area at the center of the Expo grounds.

Thailand Pavilion’s roof shape combines elements of Thai architecture with modern materials and construction methods and is designed to maximize energy efficiency and minimize resource consumption. The slope of the roof and height of the ceiling within the pavilion corresponds with the exhibitions on display and the density of visitors in each area. This space planning supports energy and resources efficiency, bringing maximum benefit. Roof elements cascade to create a smooth slope from the apex to the bottom of the eaves, and from the front to the back. In addition, visitors can feel the subtlety of Thai architecture through the assembly of sub-components that adjusts the scale of the large roof to be majestic yet not overpowering.

The design of the Thailand Pavilion is based on a variety of data analysis, from the characteristics of Thai architecture to the efficient use of internal space, all with the focus on sustainability in both energy and society. The Thailand Pavilion is a representation of our country in accordance with the theme defined by the host country and showcases the design’s effectiveness despite the differences in terrain and climate. This highlights Thailand’s potential and “Bhumi” to the world, proving the country’s abundant assets and its readiness to connect with global society sustainably into the future in various dimensions.