Given Relationship: 'be country in', Sentence: 'Japan , the first eastern Asia country adopting the western calendar , replaced the traditional lunisolar calendar with the Gregorian calendar on 1 January 1873 , and changed traditional month names into number the months , but continued to used Gengo , reign names instead of the Common Era : Meiji 1=1868 , Taisho 1=1912 , Showa 1=1926 , Heisei 1=1989 , and so on .'
country