ktk, Inc. engages in the provision of office supplies and solution services. It operates through the following segments: Supply and Solutions. The Supply segment includes recycling of used toners and cartridges and selling of office supplies such as papers, ink ribbons, computer peripherals, and printers. The Solutions segment offers network-related products such as security software and mail servers, and services such as website creation and system development. The company was founded on June 29, 1971 and is headquartered in Nagoya, Japan.