What are the meanings of wood, fire, water and earth on the Seiko mechanical watch?

Japanese means a day of the week, and "Sun, Moon, Jin Mu, Fire, Water and Earth" means a day of the week in Japanese, that is, Sunday; Month: Monday; Fire-Tuesday; Water: three; Wood: four; Kim: five; Earth: Six.

Seiko watches:

SEIKO)TYO: 8050 is a famous Japanese watchmaking company, the largest manufacturer and supplier of watch movements in Japan and South Korea, and the earliest finished watch manufacturer in Japan. The company was founded in 188 1, formerly known as Hattori Timepiece Store, and 1892 was renamed Seiko House. 1924 released the first watch officially using Seiko brand. 1995, Seiko House and Japan Oriental Watch Company set up a joint venture factory. Seiko House is also the parent company of Epson, a computer printer manufacturer.