Seven Industries Co., Ltd. Seven Industries Co., Ltd. is a Japan-based manufacturer and seller of wood-based housing components and building materials made primarily from glued laminated timber, operating through two main segments: Interior Building Materials and Wooden Construction Materials. The Interior Building Materials segment produces and sells products such as stairs, handrails, counters, Japanese-style construction materials, frames, and Western-style construction materials for residential living spaces; the Wooden Construction Materials segment manufactures and sells structural materials including pre-cut processed materials and housing panels, while also providing construction services for facility buildings and housing structures. The company additionally engages in real estate management and rental activities, primarily serving the Japanese market with a focus on creating comfortable, sustainable living spaces using ecological wood products; it maintains headquarters in Minokamo, Gifu Prefecture, and traces its roots back over 90 years as a pioneer in laminated wood technology. In recent developments, Tsuzuki Corporation completed the acquisition of an additional 13.3% stake in the company from Nishigaki Forestry Co., Ltd. in January 2025, increasing its ownership to approximately 40.13% and strengthening strategic ties within the forestry and construction supply chain.