Zentek Technology Japan, Inc. is a Japan-based company mainly engaged in the development of software and the provision of system solutions. The Company operates in four business segments. The Digital Home Appliance segment is engaged in the development and provision of software under the name MediaStack for digital television (DTV) reception. This segment also sells motherboards and provides system integration services. The Mobile-related segment is involved in the provision of inspection services for mobile phones and the development of applications. The Network-related segment is engaged in the provision of total solution services using Internet infrastructures. The Strategic Investment segment provides strategic investment services for the digital home appliance, mobile and network-related businesses. The Company has seven subsidiaries.