News

December 3, 2025

Mitsubishi Materials Corporation

System Maintenance Due to Network Equipment Upgrade

We sincerely appreciate your continued use of our website. Please be advised that the site may be temporarily unavailable during the period indicated below due to scheduled system maintenance.

We apologize for any inconvenience this may cause and appreciate your understanding.

  1. Maintenance Schedule:
    Sunday, December 7, 2025, from 8:00 AM to 10:00 AM (JST)
  2. Affected Website:
    All pages under https://www.mmc.co.jp

<Contact details for inquiries>

Corporate Communications Dept.
+81-3-5252-5206

News

Open