Considering environmental conservation to be an important management objective, OMRON formulated its "Green OMRON 21" environmental management vision in 2002. With the dual aims of long-term maximization of corporate value and contribution to the development of a sustainable society, the vision is designed to promote activities in six key areas including Eco-Mind and Eco-Management.

At the highest level of OMRON's Group-wide environmental management system is the Top Executives Environmental Meeting, which is responsible for overseeing Group-wide environmental management. Beneath it is placed the Corporate Environmental Activity Committee, which decides on Group-wide environmental measures and targets based on the Green OMRON 21 vision. Environmental committees established within business companies then align these measures and targets with their business operations to individually plan specific environmental conservation activities and implement them at each site.

The Quality & Environment Center of the Monozukuri Innovation Headquarters is tasked with planning and promoting Group-wide environmental measures. The Corporate Environmental Activity Promotion Subcommittee sets up working groups as necessary to make specialized examinations of common environmental measures and issues shared across the Group. It then submits the findings to the Corporate Environmental Activity Committee.

In 2002, OMRON established "Green OMRON 21," an environmental vision that determines the direction of OMRON's environmental management as a "21st century company," and an action plan that clearly identifies focused activities and targets. This vision was revised in 2005. The corporate-wide action plan is shared with all business companies, Head Office administrative divisions and sites under their control and incorporated into their individual action plans. While each site's implementation of the action plan is inspected by corporate audits, the target achievement status of each business company/administrative division is evaluated with the environmental management assessment system. This assessment system evaluates each business company/administrative division's activities in three areas－products, site efforts and compliance with environmental laws and regulations－and scores them with A, B and C ratings. The results of this evaluation are reflected in plans for next fiscal year, while C-rated business companies/administrative divisions are required to make additional investments in environmental conservation to make sure that improvement measures are taken.

In fiscal 2007, two BCs/divisions received A ratings, four received B ratings and one received a C rating. The C-rated BC/division is required to accelerate improvements, including an additional investment in fiscal 2008.