There is a lot of confusion pertaining to Seiko’s affiliated brands, overseas companies and distribution companies.
Below some Seiko’s organization structure.
Hope it helps.
*Above is correct as of December 2023.
Seiko organization structure
Regia ,seiko, seiko parts, seiko 6309, 6309-7040, 6309-7029, 6309-7049, seiko spare parts, seiko gasket, seiko citizen, Regia Timepieces
seikoparts 