Seiko Holdings Corporation（別窓で開く）
Consolidated management for each affiliated company within the Group

Seiko Watch Corporation（別窓で開く）
Planning for watches and other products and domestic and overseas sales

Seiko Instruments Inc.（別窓で開く）
Development, manufacturing and sales of watches, precision components and machine tools, electronic components, communication products and solutions, printers, measurement and analysis instruments

Seiko NPC Corporation（別窓で開く）
Design, development and marketing of integrated circuits (ICs)

Seiko Time Creation Inc.（別窓で開く）
Development, manufacturing and sales and after service of clocks (desk clocks, wall clocks, alarm clocks)
Sale and after service for system clocks, varied information display equipment and sports timing equipment and factory automation, as well as timing and measurement services for various sports

Seiko Optical Products Co., Ltd.（別窓で開く）
Wholesale marketing of lenses and frames for glasses along with other optical-related products

Wako Co., Ltd.（別窓で開く）
Sales of watches, jewelry, accessories, interior supplies, art goods and crafts, glasses and foodstuffs