Reducing GHG Emissions in Golf Club Manufacturing with a New Production Method

Mizuno has achieved a reduction in greenhouse gas (GHG) emissions in the manufacturing process by introducing a newly developed production method for its forged iron golf clubs, one of the core product lines of Mizuno Golf.

Mizuno’s proprietary Grain Flow Forged HD process^*¹ consists of six main steps. During the transition from Step 01 to Step 02, the forming stage draws down one end of a round steel bar. Mizuno has incorporated the newly developed Hosel HD Process in this step, for which a patent application is currently pending*².

*1 https://jpn.mizuno.com/golf/nantetsu
*2 Patent pending as of February 2026

Environmental Impact Reduction Achieved by the Hosel HD Process

By adopting the Hosel HD Process, the following environmental benefits have been confirmed compared with conventional manufacturing methods:
・Approximately 8% reduction in material input per club
・Reduced generation of manufacturing waste through a decrease in trimming volume
As a result of these improvements, the product is expected to achieve an annual reduction of approximately 53 metric tons of GHG emissions^*³.

*3 Calculated based on FY2024 production volume

Material reduction

Reduction of trimming amount

Mizuno’s Commitment to the Environment

For more than 30 years since the 1990s, Mizuno has actively advanced environmental conservation initiatives. Looking ahead, the company aims to achieve carbon neutrality across all business activities by 2050. Mizuno will continue to pursue innovation and continuous improvement across product development to help protect the global environment that enables the enjoyment of sports and to ensure a sustainable future for the next generation.