Asahi Kasei Strengthens Long-Term Profitability by Phasing Out HMD Production as Part of Structural Reform

December 5, 2025

Asahi Kasei Corporation

Asahi Kasei Strengthens Long-Term Profitability by Phasing Out HMD Production as Part of Structural Reform

 

Asahi Kasei will discontinue production of hexamethylene diamine (HMD) as part of its ongoing portfolio optimization, aiming to enhance capital efficiency and strengthen the company’s earnings profile.^​​^​​

1. Background and History

HMD and its by-product, propionitrile, are used in materials such as polyamide 66 (PA66), hexamethylene diisocyanate (HDI), and resin hardening agents. Based on an assessment of market dynamics, competitiveness, and future capital requirements, Asahi Kasei has decided to exit HMD production. The phase-out will be completed by April 2027.

2. Future Supply Structure Following the End of Production

1. (1) Discontinued products
   Target products: hexamethylenediamine (HMD), propionitrile (PN)
   End of production: April 2027 (planned)
2. (2) Future supply of downstream products
   This discontinuation will not affect the production of Asahi Kasei’s PA66 resin and filament in Nobeoka, nor the production of HDI and its derivatives in Hyuga—both located in Miyazaki Prefecture. 
3. (3) Employees engaged in the business of the relevant product group
   All affected employees will be reassigned to other roles within the company.

3. Impact on Business Performance

The impact on Asahi Kasei’s consolidated performance forecast is expected to be immaterial.

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