{"id":65856,"date":"2026-05-06T15:51:32","date_gmt":"2026-05-06T06:51:32","guid":{"rendered":"https:\/\/www.grandg.com\/ggblog\/?page_id=65856"},"modified":"2026-05-06T16:44:43","modified_gmt":"2026-05-06T07:44:43","slug":"serialnumber_perf","status":"publish","type":"page","link":"https:\/\/www.grandg.com\/ggblog\/serialnumber_perf\/","title":{"rendered":"\u30d4\u30a2\u30ce\u88fd\u9020\u756a\u53f7\u4e00\u89a7 \u30d6\u30e9\u30f3\u30c9\u5225 \u5b8c\u5168\u7248"},"content":{"rendered":"<meta charset=\"UTF-8\">\r\n\r\n<style>\r\n#page_ttl,\r\n.news_box_ttl,\r\n#pankuzu,\r\n#toc_container,\r\n#ez-toc-container,\r\n.ez-toc-container,\r\n.toc,\r\n.table-of-contents,\r\n#rtoc-mokuji-wrapper { display: none !important; }\r\n\r\n\/* \u30db\u30d0\u30fc\u306e\u307fCSS\uff08\u30a4\u30f3\u30e9\u30a4\u30f3\u3067\u306f\u4e0d\u53ef\u306e\u305f\u3081\uff09 *\/\r\n#gg-serial-top .gg-brand-card:hover {\r\n  transform: translateY(-5px) !important;\r\n  box-shadow: 0 12px 35px rgba(184,134,11,0.22) !important;\r\n  border-color: #daa520 !important;\r\n}\r\n#gg-serial-top .gg-brand-card:hover .gg-arrow {\r\n  background: linear-gradient(135deg, #b8860b, #daa520) !important;\r\n  color: #fff !important;\r\n  border-color: #b8860b !important;\r\n}\r\n#gg-serial-top .gg-search-btn:hover {\r\n  box-shadow: 0 4px 15px rgba(184,134,11,0.35) !important;\r\n  transform: translateY(-1px) !important;\r\n}\r\n#gg-serial-top .gg-cta-gold:hover {\r\n  box-shadow: 0 4px 12px rgba(184,134,11,0.3) !important;\r\n}\r\n#gg-serial-top .gg-cta-outline:hover {\r\n  background: #b8860b !important;\r\n  color: #fff !important;\r\n}\r\n@media (max-width: 700px) {\r\n  #gg-serial-top .gg-brand-grid {\r\n    grid-template-columns: 1fr !important;\r\n  }\r\n  #gg-serial-top .gg-search-row {\r\n    flex-direction: column !important;\r\n  }\r\n  #gg-serial-top .gg-search-row select,\r\n  #gg-serial-top .gg-search-row input[type=\"text\"],\r\n  #gg-serial-top .gg-search-row button {\r\n    width: 100% !important;\r\n    min-width: 0 !important;\r\n    flex: none !important;\r\n    box-sizing: border-box !important;\r\n  }\r\n}\r\n<\/style>\r\n\r\n<div id=\"gg-serial-top\" style=\"max-width:1000px; margin:0 auto; padding:60px 20px; font-family:'Noto Serif JP','Georgia',serif; color:#2c2c2c; line-height:1.6;\">\r\n\r\n  <!-- \u30d8\u30c3\u30c0\u30fc -->\r\n  <div style=\"text-align:center; margin-bottom:50px;\">\r\n    <h1 style=\"font-size:2.2em; color:#2c2c2c; margin:0 0 10px 0; padding:0; font-weight:600; letter-spacing:0.05em; font-family:'Noto Serif JP','Georgia',serif; border:none; background:none; line-height:1.3;\">\u30d4\u30a2\u30ce\u88fd\u9020\u756a\u53f7\u691c\u7d22<\/h1>\r\n    <div style=\"width:80px; height:3px; background:linear-gradient(90deg,#b8860b,#daa520,#b8860b); margin:20px auto; border-radius:2px;\"><\/div>\r\n    <p style=\"font-size:1.05em; color:#555; line-height:1.8; max-width:700px; margin:0 auto;\">\u88fd\u9020\u756a\u53f7\u304b\u3089\u30d4\u30a2\u30ce\u306e\u88fd\u9020\u5e74\u3092\u8abf\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br>\u304a\u6301\u3061\u306e\u30d4\u30a2\u30ce\u306e\u30d6\u30e9\u30f3\u30c9\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\r\n  <\/div>\r\n\r\n  <!-- \u30a2\u30b3\u30fc\u30c7\u30a3\u30aa\u30f3 -->\r\n  <div style=\"max-width:800px; margin:0 auto 50px; border:1px solid #e8d9a0; border-radius:12px; overflow:hidden; background:linear-gradient(145deg,#fffef9,#fdf8ec); box-shadow:0 4px 15px rgba(184,134,11,0.08);\">\r\n    <button onclick=\"var b=this.nextElementSibling; var open=b.style.display==='block'; b.style.display=open?'none':'block'; this.querySelector('.gg-ti').textContent=open?'\u25b6':'\u25bc';\" style=\"display:block; width:100%; padding:20px 30px; background:none; border:none; cursor:pointer; text-align:left; font-family:'Noto Serif JP','Georgia',serif; font-size:1.1em; font-weight:600; color:#8b7332; margin:0; line-height:1.5; box-shadow:none; border-radius:0;\">\r\n      <span class=\"gg-ti\" style=\"display:inline-block; margin-right:10px; font-size:0.9em;\">&#9654;<\/span>\u81ea\u5206\u306e\u30d4\u30a2\u30ce\u306e\u88fd\u9020\u5e74\u3092\u8abf\u3079\u3066\u307f\u308b\r\n    <\/button>\r\n    <div style=\"display:none; padding:0 30px 30px;\">\r\n      <p style=\"font-size:0.92em; color:#555; margin:0 0 20px 0; line-height:1.7;\">\r\n        \u30d4\u30a2\u30ce\u306e\u88fd\u9020\u756a\u53f7\u306f\u3001\u30d4\u30a2\u30ce\u5185\u90e8\u306e\u30d5\u30ec\u30fc\u30e0\uff08\u91d1\u8272\u306e\u9244\u9aa8\u90e8\u5206\uff09\u306b\u523b\u5370\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br>\r\n        \u4ee5\u4e0b\u306e\u753b\u50cf\u3092\u53c2\u8003\u306b\u3001\u304a\u6301\u3061\u306e\u30d4\u30a2\u30ce\u306e\u88fd\u9020\u756a\u53f7\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n      <\/p>\r\n\r\n      <div style=\"display:flex; gap:24px; justify-content:center; flex-wrap:wrap; margin:0 0 30px 0;\">\r\n        <div style=\"text-align:center; flex:0 1 240px;\">\r\n          <img decoding=\"async\" src=\"https:\/\/static.wixstatic.com\/media\/8fc5d5_bf2cef11c961409b9dd87e9bbd32339b~mv2.jpg\/v1\/fill\/w_246,h_251,al_c,q_80,enc_avif,quality_auto\/piano_img01.jpg\" alt=\"\u30a2\u30c3\u30d7\u30e9\u30a4\u30c8\u30d4\u30a2\u30ce\u306e\u88fd\u9020\u756a\u53f7\u4f4d\u7f6e\" style=\"width:100%; max-width:220px; height:auto; border-radius:8px; border:1px solid #e8d9a0; box-shadow:0 2px 10px rgba(0,0,0,0.08);\">\r\n          <p style=\"margin:10px 0 0 0; font-size:0.85em; color:#666; font-weight:500;\">\u30a2\u30c3\u30d7\u30e9\u30a4\u30c8\u30d4\u30a2\u30ce<br><span style=\"font-size:0.85em; color:#888;\">\u4e0a\u524d\u677f\u3092\u5916\u3057\u3066\u78ba\u8a8d<\/span><\/p>\r\n        <\/div>\r\n        <div style=\"text-align:center; flex:0 1 240px;\">\r\n          <img decoding=\"async\" src=\"https:\/\/static.wixstatic.com\/media\/8fc5d5_ef440b9546a84012a6659a0a6dcb6318~mv2.jpg\/v1\/fill\/w_226,h_267,al_c,q_80,enc_avif,quality_auto\/piano_img02.jpg\" alt=\"\u30b0\u30e9\u30f3\u30c9\u30d4\u30a2\u30ce\u306e\u88fd\u9020\u756a\u53f7\u4f4d\u7f6e\" style=\"width:100%; max-width:220px; height:auto; border-radius:8px; border:1px solid #e8d9a0; box-shadow:0 2px 10px rgba(0,0,0,0.08);\">\r\n          <p style=\"margin:10px 0 0 0; font-size:0.85em; color:#666; font-weight:500;\">\u30b0\u30e9\u30f3\u30c9\u30d4\u30a2\u30ce<br><span style=\"font-size:0.85em; color:#888;\">\u5927\u5c4b\u6839\u3092\u958b\u3051\u3066\u78ba\u8a8d<\/span><\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div style=\"background:#fff; border:1px solid #e8d9a0; border-radius:10px; padding:25px;\">\r\n        <label style=\"display:block; font-size:0.95em; color:#555; margin:0 0 12px 0; font-weight:500;\">\u30d6\u30e9\u30f3\u30c9\u3092\u9078\u629e\u3057\u3001\u88fd\u9020\u756a\u53f7\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044<\/label>\r\n        <div class=\"gg-search-row\" style=\"display:flex; gap:12px; flex-wrap:wrap;\">\r\n          <select id=\"serialBrandSelect\" style=\"padding:12px 16px; border:1px solid #d4c48a; border-radius:8px; font-size:1em; font-family:'Noto Serif JP','Georgia',serif; background:#fffef9; color:#333; flex:0 0 160px; box-shadow:none; height:auto; line-height:1.4; -webkit-appearance:auto; appearance:auto; margin:0;\">\r\n            <option value=\"\">\u30d6\u30e9\u30f3\u30c9\u9078\u629e<\/option>\r\n            <option value=\"yamaha\">\u30e4\u30de\u30cf<\/option>\r\n            <option value=\"kawai\">\u30ab\u30ef\u30a4<\/option>\r\n            <option value=\"steinway\">\u30b9\u30bf\u30a4\u30f3\u30a6\u30a7\u30a4<\/option>\r\n            <option value=\"bosendorfer\">\u30d9\u30fc\u30bc\u30f3\u30c9\u30eb\u30d5\u30a1\u30fc<\/option>\r\n            <option value=\"bechstein\">C.\u30d9\u30d2\u30b7\u30e5\u30bf\u30a4\u30f3<\/option>\r\n          <\/select>\r\n          <input type=\"text\" id=\"serialNumberInput\" placeholder=\"\u4f8b: 3500000\" style=\"padding:12px 16px; border:1px solid #d4c48a; border-radius:8px; font-size:1em; font-family:'Noto Serif JP','Georgia',serif; background:#fffef9; color:#333; flex:1; min-width:150px; box-shadow:none; height:auto; line-height:1.4; margin:0;\">\r\n          <button class=\"gg-search-btn\" onclick=\"searchSerial()\" style=\"padding:12px 28px; background:linear-gradient(135deg,#b8860b,#daa520); color:#fff; border:none; border-radius:8px; font-size:1em; font-family:'Noto Serif JP','Georgia',serif; cursor:pointer; font-weight:500; box-shadow:0 2px 8px rgba(184,134,11,0.2); transition:all 0.2s; margin:0; line-height:1.4;\">\u691c\u7d22<\/button>\r\n        <\/div>\r\n        <div id=\"serialResult\" style=\"display:none; margin:18px 0 0 0; padding:16px 20px; background:#fdf8ec; border-radius:8px; border:1px solid #e8d9a0; font-size:1em; color:#333; line-height:1.7;\"><\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <!-- \u30d6\u30e9\u30f3\u30c9\u30ab\u30fc\u30c9 -->\r\n  <div class=\"gg-brand-grid\" style=\"display:grid; grid-template-columns:repeat(auto-fit, minmax(280px, 1fr)); gap:30px; margin:40px 0 0 0; padding:0;\">\r\n\r\n    <a href=\"https:\/\/www.grandg.com\/ggblog\/yamaha_serialnumber_perf\/\" class=\"gg-brand-card\" style=\"display:block; background:linear-gradient(145deg,#fffef9,#fdf8ec); border:1px solid #e8d9a0; border-radius:12px; padding:40px 30px; text-align:center; text-decoration:none; color:#2c2c2c; box-shadow:0 4px 15px rgba(184,134,11,0.08); position:relative; overflow:hidden; transition:all 0.3s ease; border-top:4px solid #daa520;\">\r\n      <div style=\"width:60px; height:60px; margin:0 auto 20px; background:linear-gradient(135deg,#b8860b,#daa520); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:24px; color:#fff;\">&#9835;<\/div>\r\n      <div style=\"font-size:1.4em; margin:0 0 8px 0; font-weight:600; color:#2c2c2c; font-family:'Noto Serif JP','Georgia',serif; line-height:1.3;\">\u30e4\u30de\u30cf<\/div>\r\n      <div style=\"font-size:0.85em; color:#8b7332; letter-spacing:0.1em; text-transform:uppercase; margin:0 0 15px 0;\">YAMAHA<\/div>\r\n      <div style=\"font-size:0.9em; color:#666; line-height:1.6;\">1900\u5e74\u301c\u73fe\u5728\u306e\u88fd\u9020\u756a\u53f7\u4e00\u89a7<\/div>\r\n      <span class=\"gg-arrow\" style=\"display:inline-block; margin:20px 0 0 0; width:36px; height:36px; border:2px solid #daa520; border-radius:50%; line-height:32px; color:#daa520; font-size:1.1em; text-align:center; transition:all 0.3s ease; background:transparent;\">&rarr;<\/span>\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.grandg.com\/ggblog\/kawai_serialnumber_perf\/\" class=\"gg-brand-card\" style=\"display:block; background:linear-gradient(145deg,#fffef9,#fdf8ec); border:1px solid #e8d9a0; border-radius:12px; padding:40px 30px; text-align:center; text-decoration:none; color:#2c2c2c; box-shadow:0 4px 15px rgba(184,134,11,0.08); position:relative; overflow:hidden; transition:all 0.3s ease; border-top:4px solid #daa520;\">\r\n      <div style=\"width:60px; height:60px; margin:0 auto 20px; background:linear-gradient(135deg,#b8860b,#daa520); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:24px; color:#fff;\">&#9835;<\/div>\r\n      <div style=\"font-size:1.4em; margin:0 0 8px 0; font-weight:600; color:#2c2c2c; font-family:'Noto Serif JP','Georgia',serif; line-height:1.3;\">\u30ab\u30ef\u30a4<\/div>\r\n      <div style=\"font-size:0.85em; color:#8b7332; letter-spacing:0.1em; text-transform:uppercase; margin:0 0 15px 0;\">KAWAI<\/div>\r\n      <div style=\"font-size:0.9em; color:#666; line-height:1.6;\">1927\u5e74\u301c\u73fe\u5728\u306e\u88fd\u9020\u756a\u53f7\u4e00\u89a7<\/div>\r\n      <span class=\"gg-arrow\" style=\"display:inline-block; margin:20px 0 0 0; width:36px; height:36px; border:2px solid #daa520; border-radius:50%; line-height:32px; color:#daa520; font-size:1.1em; text-align:center; transition:all 0.3s ease; background:transparent;\">&rarr;<\/span>\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.grandg.com\/ggblog\/steinway_serialnumber_perf\/\" class=\"gg-brand-card\" style=\"display:block; background:linear-gradient(145deg,#fffef9,#fdf8ec); border:1px solid #e8d9a0; border-radius:12px; padding:40px 30px; text-align:center; text-decoration:none; color:#2c2c2c; box-shadow:0 4px 15px rgba(184,134,11,0.08); position:relative; overflow:hidden; transition:all 0.3s ease; border-top:4px solid #daa520;\">\r\n      <div style=\"width:60px; height:60px; margin:0 auto 20px; background:linear-gradient(135deg,#b8860b,#daa520); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:24px; color:#fff;\">&#9835;<\/div>\r\n      <div style=\"font-size:1.4em; margin:0 0 8px 0; font-weight:600; color:#2c2c2c; font-family:'Noto Serif JP','Georgia',serif; line-height:1.3;\">\u30b9\u30bf\u30a4\u30f3\u30a6\u30a7\u30a4<\/div>\r\n      <div style=\"font-size:0.85em; color:#8b7332; letter-spacing:0.1em; text-transform:uppercase; margin:0 0 15px 0;\">STEINWAY &amp; SONS<\/div>\r\n      <div style=\"font-size:0.9em; color:#666; line-height:1.6;\">1853\u5e74\u301c\u73fe\u5728\u306e\u88fd\u9020\u756a\u53f7\u4e00\u89a7<\/div>\r\n      <span class=\"gg-arrow\" style=\"display:inline-block; margin:20px 0 0 0; width:36px; height:36px; border:2px solid #daa520; border-radius:50%; line-height:32px; color:#daa520; font-size:1.1em; text-align:center; transition:all 0.3s ease; background:transparent;\">&rarr;<\/span>\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.grandg.com\/ggblog\/bosendorfer_serialnumber_perf\/\" class=\"gg-brand-card\" style=\"display:block; background:linear-gradient(145deg,#fffef9,#fdf8ec); border:1px solid #e8d9a0; border-radius:12px; padding:40px 30px; text-align:center; text-decoration:none; color:#2c2c2c; box-shadow:0 4px 15px rgba(184,134,11,0.08); position:relative; overflow:hidden; transition:all 0.3s ease; border-top:4px solid #daa520;\">\r\n      <div style=\"width:60px; height:60px; margin:0 auto 20px; background:linear-gradient(135deg,#b8860b,#daa520); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:24px; color:#fff;\">&#9835;<\/div>\r\n      <div style=\"font-size:1.4em; margin:0 0 8px 0; font-weight:600; color:#2c2c2c; font-family:'Noto Serif JP','Georgia',serif; line-height:1.3;\">\u30d9\u30fc\u30bc\u30f3\u30c9\u30eb\u30d5\u30a1\u30fc<\/div>\r\n      <div style=\"font-size:0.85em; color:#8b7332; letter-spacing:0.1em; text-transform:uppercase; margin:0 0 15px 0;\">B&Ouml;SENDORFER<\/div>\r\n      <div style=\"font-size:0.9em; color:#666; line-height:1.6;\">1828\u5e74\u301c\u73fe\u5728\u306e\u88fd\u9020\u756a\u53f7\u4e00\u89a7<\/div>\r\n      <span class=\"gg-arrow\" style=\"display:inline-block; margin:20px 0 0 0; width:36px; height:36px; border:2px solid #daa520; border-radius:50%; line-height:32px; color:#daa520; font-size:1.1em; text-align:center; transition:all 0.3s ease; background:transparent;\">&rarr;<\/span>\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.grandg.com\/ggblog\/bechstein_serialnumber_perf\/\" class=\"gg-brand-card\" style=\"display:block; background:linear-gradient(145deg,#fffef9,#fdf8ec); border:1px solid #e8d9a0; border-radius:12px; padding:40px 30px; text-align:center; text-decoration:none; color:#2c2c2c; box-shadow:0 4px 15px rgba(184,134,11,0.08); position:relative; overflow:hidden; transition:all 0.3s ease; border-top:4px solid #daa520;\">\r\n      <div style=\"width:60px; height:60px; margin:0 auto 20px; background:linear-gradient(135deg,#b8860b,#daa520); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:24px; color:#fff;\">&#9835;<\/div>\r\n      <div style=\"font-size:1.4em; margin:0 0 8px 0; font-weight:600; color:#2c2c2c; font-family:'Noto Serif JP','Georgia',serif; line-height:1.3;\">C.\u30d9\u30d2\u30b7\u30e5\u30bf\u30a4\u30f3<\/div>\r\n      <div style=\"font-size:0.85em; color:#8b7332; letter-spacing:0.1em; text-transform:uppercase; margin:0 0 15px 0;\">C. BECHSTEIN<\/div>\r\n      <div style=\"font-size:0.9em; color:#666; line-height:1.6;\">1853\u5e74\u301c\u73fe\u5728\u306e\u88fd\u9020\u756a\u53f7\u4e00\u89a7<\/div>\r\n      <span class=\"gg-arrow\" style=\"display:inline-block; margin:20px 0 0 0; width:36px; height:36px; border:2px solid #daa520; border-radius:50%; line-height:32px; color:#daa520; font-size:1.1em; text-align:center; transition:all 0.3s ease; background:transparent;\">&rarr;<\/span>\r\n    <\/a>\r\n\r\n  <\/div>\r\n\r\n  <div style=\"text-align:center; margin:60px 0 0 0; padding:40px 0 0 0; border-top:1px solid #e8d9a0;\">\r\n    <p style=\"font-size:0.9em; color:#888; line-height:1.8; margin:0;\">\u203b \u88fd\u9020\u756a\u53f7\u306f\u30d4\u30a2\u30ce\u5185\u90e8\uff08\u30d5\u30ec\u30fc\u30e0\u3084\u97ff\u677f\u4ed8\u8fd1\uff09\u306b\u523b\u5370\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br>\r\n    \u3054\u4e0d\u660e\u306a\u5834\u5408\u306f\u304a\u6c17\u8efd\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\u3002<\/p>\r\n    <div style=\"margin:20px 0 0 0; display:flex; gap:20px; justify-content:center; flex-wrap:wrap; align-items:center;\">\r\n      <a href=\"tel:0120-25-9939\" style=\"color:#b8860b; text-decoration:none; font-size:1.1em; font-weight:600; letter-spacing:0.05em; transition:color 0.2s;\">&#9742; 0120-25-9939<\/a>\r\n      <a href=\"https:\/\/www.grandg.com\/f\/contact\" style=\"display:inline-block; padding:10px 24px; border-radius:24px; font-size:0.9em; font-weight:500; text-decoration:none; border:1.5px solid #b8860b; color:#8b7332; background:#fff; transition:all 0.2s;\">\u30d4\u30a2\u30ce\u306e\u3054\u76f8\u8ac7<\/a>\r\n    <\/div>\r\n  <\/div>\r\n<\/div>\r\n\r\n<script>\r\nvar serialData = {\r\n  yamaha: [\r\n    [1900,1],[1905,500],[1907,1000],[1909,2000],\r\n    [1910,3000],[1912,5000],[1914,7000],[1916,10000],[1917,12000],[1918,14000],[1919,15000],\r\n    [1920,17000],[1921,19000],[1922,21000],[1923,23000],[1924,25000],[1925,27000],[1926,29000],[1927,32000],[1928,35000],[1929,39000],\r\n    [1930,42000],[1931,44000],[1932,46000],[1933,48000],[1934,50000],[1935,52000],[1936,55000],[1937,58000],[1938,61000],[1939,63000],\r\n    [1940,65000],[1941,66000],[1942,67000],[1943,68000],[1944,69000],[1945,70000],[1946,71000],[1947,73000],[1948,76000],[1949,80000],\r\n    [1950,85000],[1951,93000],[1952,106000],[1953,121000],[1954,141000],[1955,166000],[1956,197000],[1957,233000],[1958,280000],[1959,338000],\r\n    [1960,404000],[1961,483000],[1962,574000],[1963,670000],[1964,790000],[1965,930000],[1966,1090000],[1967,1270000],[1968,1460000],[1969,1670000],\r\n    [1970,1900000],[1971,2100000],[1972,2360000],[1973,2600000],[1974,2860000],[1975,3100000],[1976,3330000],[1977,3530000],[1978,3730000],[1979,3920000],\r\n    [1980,4100000],[1981,4280000],[1982,4430000],[1983,4580000],[1984,4710000],[1985,4830000],[1986,4950000],[1987,5070000],[1988,5180000],[1989,5290000],\r\n    [1990,5400000],[1991,5500000],[1992,5580000],[1993,5650000],[1994,5720000],[1995,5790000],[1996,5860000],[1997,5930000],[1998,6000000],[1999,6060000],\r\n    [2000,6100000],[2001,6150000],[2002,6200000],[2003,6240000],[2004,6280000],[2005,6320000],[2006,6360000],[2007,6400000],[2008,6430000],[2009,6460000],\r\n    [2010,6490000],[2011,6520000],[2012,6540000],[2013,6560000],[2014,6580000],[2015,6600000],[2016,6620000],[2017,6640000],[2018,6660000],[2019,6680000],\r\n    [2020,6700000],[2021,6720000],[2022,6740000],[2023,6760000],[2024,6780000]\r\n  ],\r\n  kawai: [\r\n    [1927,1],[1930,500],[1935,1500],[1940,3000],[1945,4000],[1948,5000],\r\n    [1950,7000],[1952,12000],[1954,20000],[1955,28000],[1956,37000],[1957,49000],[1958,64000],[1959,82000],\r\n    [1960,105000],[1961,130000],[1962,160000],[1963,195000],[1964,240000],[1965,295000],[1966,360000],[1967,440000],[1968,530000],[1969,630000],\r\n    [1970,740000],[1971,860000],[1972,1000000],[1973,1140000],[1974,1290000],[1975,1430000],[1976,1570000],[1977,1700000],[1978,1830000],[1979,1960000],\r\n    [1980,2080000],[1981,2180000],[1982,2280000],[1983,2370000],[1984,2450000],[1985,2530000],[1986,2600000],[1987,2670000],[1988,2740000],[1989,2800000],\r\n    [1990,2860000],[1991,2910000],[1992,2950000],[1993,2990000],[1994,3020000],[1995,3050000],[1996,3080000],[1997,3110000],[1998,3130000],[1999,3150000],\r\n    [2000,3170000],[2001,3190000],[2002,3210000],[2003,3230000],[2004,3250000],[2005,3270000],[2006,3290000],[2007,3310000],[2008,3330000],[2009,3350000],\r\n    [2010,3370000],[2011,3390000],[2012,3410000],[2013,3430000],[2014,3450000],[2015,3470000],[2016,3490000],[2017,3510000],[2018,3530000],[2019,3550000],\r\n    [2020,3570000],[2021,3590000],[2022,3610000],[2023,3630000],[2024,3650000]\r\n  ],\r\n  steinway: [\r\n    [1853,483],[1860,2000],[1865,7000],[1870,17000],[1875,30000],[1880,45000],[1885,60000],[1890,75000],[1895,90000],\r\n    [1900,100000],[1905,120000],[1910,140000],[1915,160000],[1920,180000],[1925,210000],[1930,270000],[1935,295000],[1940,310000],[1945,318000],\r\n    [1950,330000],[1955,350000],[1960,370000],[1965,395000],[1970,420000],[1975,445000],[1980,470000],[1985,495000],[1990,520000],[1995,540000],\r\n    [2000,560000],[2005,575000],[2010,590000],[2015,600000],[2020,615000],[2024,625000]\r\n  ],\r\n  bosendorfer: [\r\n    [1828,1],[1850,1000],[1860,2500],[1870,4500],[1880,7000],[1890,11000],[1900,16000],[1910,21000],[1920,25000],[1930,28000],\r\n    [1940,30000],[1950,32000],[1960,34000],[1970,37000],[1975,39000],[1980,41000],[1985,43000],[1990,45000],[1995,47000],\r\n    [2000,49000],[2005,50500],[2010,52000],[2015,53500],[2020,55000],[2024,56000]\r\n  ],\r\n  bechstein: [\r\n    [1853,1],[1859,176],[1861,476],[1862,710],[1863,1002],[1864,1305],[1865,1595],[1866,1869],[1867,2369],[1868,3154],[1869,3673],\r\n    [1870,4196],[1871,4855],[1872,5756],[1873,6580],[1874,7328],[1875,8070],[1876,8924],[1877,9596],[1878,10213],[1879,10933],\r\n    [1880,11676],[1881,12558],[1882,13596],[1883,14715],[1884,15705],[1885,16704],[1886,17629],[1887,19058],[1888,20640],[1889,22628],\r\n    [1890,24958],[1891,27456],[1892,30198],[1893,32735],[1894,35111],[1895,37785],[1896,40448],[1897,43352],[1898,46879],[1899,50490],\r\n    [1900,54181],[1901,57871],[1902,61615],[1903,65809],[1904,69829],[1905,73876],[1906,78185],[1907,82390],[1908,86114],[1909,90138],\r\n    [1910,94753],[1911,99496],[1912,103786],[1913,108112],[1914,110016],[1915,110898],[1916,112067],[1917,113123],[1918,113773],[1919,114822],\r\n    [1920,115783],[1921,117126],[1922,119211],[1923,121332],[1924,123320],[1925,126160],[1926,128572],[1927,131473],[1928,133743],[1929,136067],\r\n    [1930,137446],[1932,138345],[1933,138989],[1935,139999],[1936,140714],[1937,141600],[1938,142417],[1939,143270],\r\n    [1940,143890],[1941,144360],[1942,144740],[1943,145000],[1944,145220],[1945,145235],\r\n    [1950,147009],[1951,147133],[1955,148403],[1957,149449],[1959,151342],\r\n    [1960,151400],[1965,156525],[1966,157574],[1967,158728],[1968,159845],[1969,161114],\r\n    [1970,162336],[1971,163405],[1972,164415],[1975,167798],[1978,171410],\r\n    [1980,173785],[1981,174819],[1983,176481],[1984,177170],[1985,177801],[1988,179754],[1989,180198],\r\n    [1990,180312],[1992,181526],[1994,183219],[1995,183917],[1996,184580],[1997,185302],[1998,186074],[1999,186666],\r\n    [2000,187537],[2001,188393],[2002,189243],[2003,190386],[2004,191644],[2005,192945],[2006,194398],[2007,196024],[2008,197624],[2009,199093],\r\n    [2010,200688],[2011,202173],[2012,203629],[2013,204914],[2014,206300],[2015,207540]\r\n  ]\r\n};\r\n\r\nfunction searchSerial() {\r\n  var brand = document.getElementById('serialBrandSelect').value;\r\n  var numStr = document.getElementById('serialNumberInput').value.replace(\/[,\\s]\/g, '');\r\n  var num = parseInt(numStr, 10);\r\n  var resultEl = document.getElementById('serialResult');\r\n\r\n  if (!brand) {\r\n    resultEl.style.display = 'block';\r\n    resultEl.innerHTML = '<span style=\"color:#b8860b;\">\u26a0 \u30d6\u30e9\u30f3\u30c9\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/span>';\r\n    return;\r\n  }\r\n  if (isNaN(num) || num <= 0) {\r\n    resultEl.style.display = 'block';\r\n    resultEl.innerHTML = '<span style=\"color:#b8860b;\">\u26a0 \u88fd\u9020\u756a\u53f7\u3092\u6b63\u3057\u304f\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u6570\u5b57\u306e\u307f\uff09\u3002<\/span>';\r\n    return;\r\n  }\r\n\r\n  var data = serialData[brand];\r\n  var year = null;\r\n  for (var i = data.length - 1; i >= 0; i--) {\r\n    if (num >= data[i][1]) {\r\n      year = data[i][0];\r\n      break;\r\n    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dashed #e8d9a0; display:flex; gap:10px; flex-wrap:wrap;\">' +\r\n        '<a href=\"https:\/\/www.grandg.com\/ggblog\/ggpianokaitori\/\" class=\"gg-cta-gold\" style=\"display:inline-block; padding:10px 20px; border-radius:24px; font-size:0.85em; font-weight:500; text-decoration:none; background:linear-gradient(135deg,#b8860b,#daa520); color:#fff; transition:all 0.2s; border:none;\">\u3053\u306e\u30d4\u30a2\u30ce\u3092\u67fb\u5b9a\u3059\u308b<\/a>' +\r\n        '<a href=\"https:\/\/www.grandg.com\/f\/contact\" class=\"gg-cta-outline\" style=\"display:inline-block; padding:10px 20px; border-radius:24px; font-size:0.85em; font-weight:500; text-decoration:none; border:1.5px solid #b8860b; color:#8b7332; background:#fff; transition:all 0.2s;\">\u30d4\u30a2\u30ce\u306e\u3054\u76f8\u8ac7<\/a>' +\r\n      '<\/div>';\r\n  } else {\r\n    resultEl.style.display = 'block';\r\n    resultEl.innerHTML = '<span style=\"color:#b8860b;\">\u26a0 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