Japanese houses are often made of paper, specifically a strong and durable paper called washi made from mulberry trees. The use of paper walls and doors allows for natural light to permeate through the house, creating a warm and inviting atmosphere while also providing insulation. Traditional Japanese houses prioritize function over form, with minimalist design and specific principles in mind. They are also designed to be flexible and adaptable, with movable walls that can be adjusted according to residents' needs. Despite the use of paper walls and doors, privacy is still a priority in Japanese houses. Modern Japanese houses combine traditional elements with modern technology and design.