1980 – 1989
| 1980 | Establishment of subsidiary in the Netherlands. |
|---|---|
| 1981 | Establishment of representative office in Dubai. Introduction of Lassale brand. |
| 1982 | Seiko serves as Official Timer of World Cup Soccer Championships in Spain. Introduction of world's first TV watch. Introduction of Lorus brand.  |
| 1983 | K. Hattori & Co., Ltd. renamed as Hattori Seiko Co., Ltd. Introduction of world's first watch with sound-recording functions. |
| 1984 | Introduction of world's first “talking” clock, the Seiko Pyramid Talk. |
| 1986 | Seiko serves as Official Timer of World Cup Soccer Championships in Mexico. |
| 1987 | Seiko serves as Official Timer of 2nd IAAF World Championships in Athletics in Italy. |
| 1988 | Introduction of quartz watch with sweep second hand. Introduction of world's first automatic power generating quartz watch. Introduction of world's first intelligent analogue quartz watch with alarm, chronograph and timer functions controlled by an IC “computer on a chip”.  |
| 1989 | Establishment of subsidiary in Thailand. |
