CO₂ Reduction

Breakdown of CO₂ emissions

CO₂ accounts for most of the greenhouse gases released by TAMRON. As regards the sources of CO₂ emissions (excluding distribution and logistics), electricity usage accounts for 99%, followed by heavy oil at 1%. Given this mix, our energy saving activities focus on electricity.

Change in CO₂ emissions

In 2025, Tamron set the target of reducing CO₂ emissions by 15% compared with 2015 levels. Tamron Optical (Foshan) in China and Tamron Optical (Vietnam) Plant 1 in Vietnam are utilizing solar power generation to generate power from renewable energy for self-consumption. Approximately 30% of the electricity used at our head office and 25% of the electricity used at our Aomori Plant (Namioka Site) comes from non–fossil fuel certified sources, effectively reducing CO₂ emissions for this electricity
to zero. Tamron Optical (Foshan) and Tamron Optical (Vietnam) Plant 1 have also purchased I-REC for a portion of their electricity usage, effectively reducing their CO₂ emissions to zero for that portion. In part due to those effects, overall we were able to achieve our targets with a reduction of 21.9%, exceeding the target reduction.

Ascertaining CO₂ emissions in the supply chain (Scope3)

In order to realize a low-carbon society, not only activities within TAMRON but also efforts throughout the supply chain including upstream and downstream are important. To promote our efforts, we have grasped indirect greenhouse gases (Scope 3) related to business activities in the supply chain.

Breakdown of Scope

Change in Scope 3

Please see below for details of scope 3 data.

Ascertaining CO₂ Emissions in the Supply Chain (FY2025)

Energy-Saving Initiatives

Tamron Optical (Foshan) installed a solar power generation system and reduced emissions by approximately 540 tons of CO₂, equivalent to around 2% of its electricity consumption in 2025. Tamron Optical (Vietnam) Plant 1 also installed a solar power generation system, reducing emissions by approximately 550 tons of CO₂, equivalent to around 5.3% of its electricity consumption in 2025. Approximately 30% of the electricity used at our head office is supplied by Green Basic Plan*1, which is non–fossil fuel certified. From November 2024, the Aomori Plant (Namioka Site) has drawn approximately 25% of its electricity from Yorisou Renewable-Energy Power*2, which is also certified as non–fossil fuel electricity. Tamron Optical (Foshan) has also purchased I-REC*3 (hydroelectric) to cover a portion of its electricity consumption, and Vietnam Plant 1 has purchased I-REC*3 (solar) to cover part of its electricity consumption since 2024, resulting in a total
reduction of approximately 16,300 tons of CO₂. In 2026, we have set the target of reducing CO₂ emissions by at least 18% compared with 2015 levels, and will make every effort to achieve this target.

* 1 Green Basic Plan: An RE100-compatible effective renewable energy option that combines FIT non–fossil fuel certificates (with tracking) for the average electric power of all power sources provided by TEPCO Energy Partner, Inc., and non-FIT non–fossil fuel certifications (with information about power source attributes) specific to renewable
energies.
* 2 Yorisou Renewable-Energy Power: An effective renewable energy option that combines non–fossil fuel certificates derived from hydroelectric power provided by Tohoku Electric Power Co., Inc.
* 3 I-REC: Renewable energy–based electricity certificates certified and issued according to the rulebooks and electronic tracking systems based on them provided by the Netherlands-based nonprofit organization I-REC Standard.

TAMRON is participating in the “Electrical and Electronics Industry Low Carbon Society Action Plan,” an initiative to combat global warming.