ONTEX Group is a Japanese home renovation business specializing in exterior painting and roof remodeling. Through its subsidiary, Ontex Co., Ltd., the group manages sales, construction and project supervision in-house, providing customers with a coordinated, one-stop service from initial consultation through completion. Its renovation services cover exterior walls, roofs and waterproofing, solar power generation, exterior spaces, housing equipment, interiors, and extensions or other remodeling work.

ONTEX guides customers through each stage of a project, explaining the work and monitoring construction quality. Homeowners can request information or a free estimate, visit a showroom, review renovation examples, and contact the company with questions. The group reports more than 150,000 cumulative projects and around 600 projects per month as of April 2025, alongside 58 locations nationwide. Customer feedback featured on its website frequently highlights clear explanations, attentive communication, careful workmanship, and support after construction. With a broad range of residential renovation options and an integrated approach to planning and delivery, ONTEX aims to help homeowners improve and maintain their homes with confidence.