CitizenWatch: CitizenWatch is a watch brand founded by the Citizen Group in 1918, with the mission of providing high quality products and services to all citizens around the world, hoping to contribute to a better life for all people through products that are "loved and loved by the public".

Nishitetsu City History: The predecessor of Nishitetsu City Inc. CITIZEN brand of timekeeping products began in 1924, is a pocket watch. The mayor of Tokyo at the time, Mr. Shinpei Goto expects this painstakingly developed Japanese-made pocket watch to become "for CITIZEN, that is, all the citizens of the world, loved by" the product, so it was named "CITIZEN". Therefore, it is named "CITIZEN".

Photokinetic is Citizen's patented technology that uses natural or artificial light to power the movement of the watch. It uses natural or artificial light to power the watch. It converts any visible light source into power to drive the watch, and the remaining power is stored in a rechargeable battery that can be recycled. This has earned Citizen a reputation as an environmentally friendly watch.