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is the core company of a Japanese global corporate group based in Tokyo, Japan. The company was originally founded as Shokosha Watch Research Institute in 1918 and is currently known as the manufacturer of Cincom precision lathe machine tools as well as Citizen watches. The trade name originated from a pocket watch Citizen sold in 1924. It is one of the world's largest producers of watches. ==Eco-Drive== Eco-Drive watches use a battery recharged by a solar panel hidden under the watch face. In the rare and discontinued Eco-Drive Duo series, the solar power was supplemented by an automatic quartz power source. One early model, called the Citizen Vitality, used the watch hands to drive a small electric generator, but was discontinued following complaints that the device could explode and cause wrist injuries. There was also an Eco-Drive Thermo model that exploited temperature differentials between the wearer's skin temperature and ambient temperature to recharge the battery. However, the only Eco-Drive system described on the Citizen Watch official web site is the one depending solely on light to recharge. Features similar to the Eco-Drive have been developed by other manufacturers like Casio and Junghans. All Citizen Eco-Drive movements are made in Japan but the case or the bracelet may also be made in China. File:CITIZEN JY8034-58E Navihawk A-T.jpg|CITIZEN JY8034-58E File:CITIZEN JY8034-58E Navihawk A-T.1.jpg|CITIZEN JY8034-58E File:CITIZEN JY8034-58E Navihawk A-T.3.jpg|CITIZEN JY8034-58E File:CITIZEN JY8034-58E Navihawk A-T.4.jpg|CITIZEN JY8034-58E File:CITIZEN JY8034-58E Navihawk A-T.6.jpg|CITIZEN JY8034-58E 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Citizen Holdings」の詳細全文を読む スポンサード リンク
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