Announcement of the Launch of Sales Promotion Activities for Hub Blades Manufactured by AA Diamond Technology Co., Ltd.

2026-7-1

Tokyo Seimitsu Co., Ltd. (hereinafter “Tokyo Seimitsu”) will launch sales promotion activities for hub blades (a type of dicing blade used in dicing machines) developed and manufactured by AA Diamond Technology Co., Ltd. (hereinafter “AA Diamond”) in collaboration with Asahi Diamond Industry Co., Ltd. (hereinafter “Asahi Diamond”) effective July 1, 2026.

AA Diamond is a joint venture company established by Tokyo Seimitsu and Asahi Diamond on May 9, 2025, for the purpose of developing, manufacturing, and selling hub blades, and has obtained ISO 9001 certification. For an overview of the joint venture company, please refer to the press release dated May 9, 2025.

Establishment of Joint Venture Company "AA Diamond Technology Co., Ltd.”

Please note that Tokyo Seimitsu discontinued sales of its own hub blade products as of the end of June 2026.