With respect to the OMRON Group's Sustainability Report 2008, OMRON received a preliminary examination regarding material environmental performance data, conducted by Tohmatsu Environmental Research Institute Ltd. The purpose of the examination was to investigate development status of a data summation system, in preparation for receiving an independent review of material information to be included in its Sustainability Report in the future.

June 6, 2008

To OMRON Corporation:

Hiroshi　Enoki
The Representative Director
Tohmatsu Environmental Research Institute Ltd.

In preparation for an upcoming independent review of the OMRON Group's Sustainability Report, Tohmatsu Environmental Research Institute Ltd. has conducted an examination (hereinafter referred to as "the Preliminary Examination") focusing on OMRON's data summation system for material environmental performance data included in the Company's Sustainability Report 2008 for the period from April 1, 2007 through March 31, 2008. This Preliminary Examination was not designed to provide assurance or attestation. The following summarizes matters identified as a result of the examination for reporting.

Please note that the Preliminary Examination was not intended to provide detailed review of the Company's material environmental performance data, but was conducted as a part of the Company's drive to develop a system for accepting an independent review. As such, the examination did not cover all issues related to environmental management and disclosure of environmental information.

1. Calculation method for environmental performance data

With respect to calculation and summation of environmental performance data, standard forms are in place for each site to make a report to the Quality & Environment Center of OMRON's Head Office, and calculation methods and data entry procedures are described in a relatively easy-to-understand manner. However, certain data calculation errors were identified for a part of the environmental performance calculated at a site. It is therefore desirable that the calculation methods be indicated more clearly in the forms prepared by the Quality & Environment Center. It is also desirable that improvements be made on calculation formats to ensure error-free calculation.

2. Upgrading the environmental information management system

In fiscal 2003, an environmental information management system was introduced to OMRON Group companies in Japan, for use in the reporting and summation of environmental performance data. We have confirmed that this system has been used appropriately.

Additionally, a new environmental information management system is currently being built, and which can be accessed by overseas Group companies. This system is intended to help strengthen global management of environmental performance data. We expect OMRON to further improve the forms to ensure correct data entry at each site, while incorporating a function in the new system that can detect potentially incorrect data.

3. Earlier summation of environmental performance data

With respect to environmental performance data reported from individual sites, including those of Group companies subject to information disclosure, the Quality & Environment Center checks the data through comparative analyses based on changes over time, and makes corrections or revisions by reconfirming the data in question with the concerned site, when deemed necessary. Checking data and re-confirming data against each site requires several weeks and substantial manpower. We therefore expect OMRON to strengthen the checking function of each site regarding accuracy of data for enhanced precision of data reported by each site, so as to facilitate prompter summation of environmental performance data.

In closing, we would like to add that it is clear from the contents of the Sustainability Report 2008 that OMRON has had a thorough discussion and identified important elements of OMRON's CSR from the perspective of "materiality for CSR issues." In the future, we hope that OMRON will develop major performance indicators related to material CSR issues that OMRON has identified, in order to further promote its CSR management. As part of this drive, we also expect that OMRON will confirm the development of a sufficient structure for calculating and summating social performance data to be disclosed with respect to material CSR issues, as well as environmental performance data.