{"id":9873,"date":"2026-01-23T15:12:29","date_gmt":"2026-01-23T06:12:29","guid":{"rendered":"https:\/\/rakkokeyword.com\/techo\/?p=9873"},"modified":"2026-01-30T10:56:08","modified_gmt":"2026-01-30T01:56:08","slug":"tool-wareki-to-seireki","status":"publish","type":"post","link":"https:\/\/rakkokeyword.com\/techo\/tool-wareki-to-seireki\/","title":{"rendered":"\u548c\u66a6\u21d2\u897f\u66a6\u5909\u63db\u30c4\u30fc\u30eb"},"content":{"rendered":"\n<div class=\"wrk_tool_container\">\n    <div class=\"wrk_link_area_tab\">\n        <div class=\"wrk_tab_container\">\n            <span class=\"wrk_tab_item wrk_tab_active\">\u548c\u66a6 \u21d2 \u897f\u66a6<\/span>\n            <a href=\"https:\/\/rakkokeyword.com\/techo\/tool-seireki-to-wareki\" class=\"wrk_tab_item wrk_tab_link\">\u897f\u66a6 \u21d2 \u548c\u66a6<\/a>\n        <\/div>\n    <\/div>\n\n    <div class=\"wrk_section wrk_input_bg\">\n        <p class=\"wrk_section_title\">\u548c\u66a6\u3092\u5165\u529b<\/p>\n        \n        <div class=\"wrk_input_container\">\n            <div class=\"wrk_input_row\">\n                <select id=\"wrk_select_era\" class=\"wrk_select\" aria-label=\"\u5143\u53f7\u3092\u9078\u629e\">\n                    <option value=\"reiwa\">\u4ee4\u548c<\/option>\n                    <option value=\"heisei\">\u5e73\u6210<\/option>\n                    <option value=\"showa\">\u662d\u548c<\/option>\n                    <option value=\"taisho\">\u5927\u6b63<\/option>\n                    <option value=\"meiji\">\u660e\u6cbb<\/option>\n                <\/select>\n                \n                <div class=\"wrk_num_wrap\">\n                    <input type=\"number\" id=\"wrk_input_year\" min=\"1\" max=\"100\" value=\"8\" placeholder=\"\u5e74\" aria-label=\"\u548c\u66a6\u5e74\u5165\u529b\">\n                    <span class=\"wrk_unit\">\u5e74<\/span>\n                <\/div>\n            <\/div>\n            <p 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class=\"wrk_result_unit\">\u5e74<\/span>\n            <\/div>\n            <button type=\"button\" id=\"wrk_copy_btn\" class=\"wrk_main_btn\" aria-label=\"\u897f\u66a6\u3092\u30b3\u30d4\u30fc\">\u7d50\u679c\u3092\u30b3\u30d4\u30fc<\/button>\n        <\/div>\n\n        <button type=\"button\" id=\"wrk_reset_btn\" class=\"wrk_reset_link\">\u5165\u529b\u3092\u30ea\u30bb\u30c3\u30c8<\/button>\n    <\/div>\n<\/div>\n\n<style>\n\/* Base Setup *\/\n.wrk_tool_container {\n    width: 100%;\n    max-width: 720px;\n    margin: 0 auto;\n    font-family: sans-serif;\n    color: #333;\n    text-align: center;\n}\n.wrk_tool_container * { box-sizing: border-box; }\n\n\/* Tab Design *\/\n.wrk_link_area_tab { margin-bottom: 25px; }\n.wrk_tab_container { display: flex; width: 100%; gap: 8px; }\n.wrk_tab_item {\n    flex: 1;\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    height: 50px;\n    font-size: 14px;\n    font-weight: bold;\n    text-decoration: none;\n    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*\/\n}\n\n\/* Note Style *\/\n.wrk_note_sm {\n    font-size: 13px;\n    color: #888;\n    margin: 8px 0 0 0;\n    text-align: center;\n}\n\n.wrk_error_msg { font-size: 12px; color: #d32f2f; margin-top: 8px; min-height: 18px; }\n\n\/* Flow Arrow *\/\n.wrk_flow_arrow { padding: 10px 0; }\n\n\/* Result Display *\/\n.wrk_result_display { margin-bottom: 30px; }\n.wrk_result_main {\n    display: flex;\n    justify-content: center;\n    align-items: baseline;\n    gap: 8px;\n    margin-bottom: 20px;\n}\n.wrk_result_unit_prefix { font-size: 18px; font-weight: bold; color: #666; }\n.wrk_result_number {\n    font-size: 48px;\n    font-weight: bold;\n    font-family: monospace;\n    color: #000;\n}\n.wrk_result_unit { font-size: 24px; font-weight: bold; color: #666; }\n\n\/* Buttons *\/\n.wrk_main_btn {\n    height: 44px;\n    padding: 0 24px;\n    background: #13284B;\n    color: #fff;\n    border: none;\n    border-radius: 6px;\n    font-weight: bold;\n    cursor: pointer;\n    font-size: 14px;\n    transition: background-color 0.2s;\n    line-height: 1; \/* \u30dc\u30bf\u30f3\u5185\u30c6\u30ad\u30b9\u30c8\u306e\u30ba\u30ec\u9632\u6b62 *\/\n}\n.wrk_main_btn:hover { background: #0d1a31; }\n.wrk_reset_link {\n    background: none;\n    border: none;\n    color: #999;\n    text-decoration: underline;\n    cursor: pointer;\n    margin-top: 15px;\n    font-size: 13px;\n}\n.wrk_reset_link:hover { color: #666; }\n\n\/* Responsive *\/\n@media (max-width: 500px) {\n    .wrk_result_number { font-size: 36px; }\n    .wrk_result_unit { font-size: 18px; }\n    .wrk_select { width: auto !important; min-width: 70px !important; font-size: 14px !important; }\n    .wrk_num_wrap input[type=\"number\"] { width: 80px !important; height: 44px !important; font-size: 16px !important; 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