Japanese Date & Calendar Tools (日付・カレンダーツール)
Japan uses a dual calendar system — the Western Gregorian calendar alongside the traditional imperial era calendar (元号, gengō). Official documents, government forms, and everyday life in Japan regularly reference era years such as Reiwa (令和), Heisei (平成), and Showa (昭和). The tools in this category help you convert between systems, calculate your age the Japanese way, and look up calendar information quickly.
About Japanese Era Years (元号)
The current era is Reiwa (令和), which started May 1, 2019. Before Reiwa was Heisei (平成, 1989–2019) and Showa (昭和, 1926–1989). Each era begins when a new emperor ascends the throne. Use the era date converter to switch between any era year and its Western equivalent, or visit the specific era pages for complete year-by-year reference tables.