The romance of tracking the lunar cycle is one of the many exciting possibilities inherent in Radio-Controlled technology. In 2023, we released the world's first analogue light-powered watch to feature a moon phase display.

When breakthrough technology and spectacular design meet, the Tsuki-yomi A-T is reading the moon. It’s the world’s first moonphase watch combined with atomic timekeeping innovation from Citizen, and this model is nothing short of impressive.

Time signals are received from transmitters, or atomic clocks, located in four regions—Europe, the United States, China, and Japan—applicable to world multiband models. The map shown is a rough illustration only; concentric circles indicating time signals are purely visual and do not represent actual coverage ranges. Coverage may vary by model, and reception can be affected by radio noise, local topography, buildings, and weather conditions. Time differences and city names may also change depending on the country or territory.