src/share/classes/sun/util/cldr/resources/21_0_1/common/main/ja.xml

*** 2408,2417 ****
--- 2408,2418 ----
                                                  <era type="231">慶応</era>
                                                  <era type="232">明治</era>
                                                  <era type="233">大正</era>
                                                  <era type="234">昭和</era>
                                                  <era type="235">平成</era>
+                                                 <era type="236">元号</era> <!-- NewEra -->
                                          </eraAbbr>
                                  </eras>
                                  <dateFormats>
                                          <dateFormatLength type="full">
                                                  <dateFormat>