JK Holdings Co., Ltd. wholesales decorative plywood, building materials, and housing equipment in Japan and internationally, operating through three segments: General Building Materials Wholesale, General Building Materials Retail, and Plywood Manufacturing and Wood Processing. Its products include ordinary, secondary, structural, and long plywood, plywood-based products, veneer, laminated veneer, timber, lumber, laminated processed products, wood products, logs, building materials, and home appliances. The company also offers structural design, wooden structural frames, pre-cutting, construction, material supply for wooden interiors, and installation, and is involved in construction work, warehousing and transportation, general cargo, material brokerage, real estate rental, franchise business, travel and insurance agency, housing loans, and e-commerce and management. It exports its products and was founded in 1937, with headquarters in Koto, Japan.