{"id":24463,"date":"2026-04-16T01:25:39","date_gmt":"2026-04-16T01:25:39","guid":{"rendered":"https:\/\/www.booksofall.com\/ja\/five-forces-model-failed-business-strategies\/"},"modified":"2026-04-16T01:25:39","modified_gmt":"2026-04-16T01:25:39","slug":"five-forces-model-failed-business-strategies","status":"publish","type":"post","link":"https:\/\/www.booksofall.com\/ja\/five-forces-model-failed-business-strategies\/","title":{"rendered":"\u30d5\u30a1\u30a4\u30d6\u30d5\u30a9\u30fc\u30b9\u30e2\u30c7\u30eb\uff1a\u5931\u6557\u3057\u305f\u30d3\u30b8\u30cd\u30b9\u6226\u7565\u304b\u3089\u5b66\u3076\u6559\u8a13"},"content":{"rendered":"<p>\u30d3\u30b8\u30cd\u30b9\u6226\u7565\u306f\u3001\u3044\u3064\u3082\u9727\u306e\u4e2d\u3092\u8239\u3092\u64cd\u308b\u3088\u3046\u306a\u611f\u899a\u306b\u9665\u308b\u3002\u30ea\u30fc\u30c0\u30fc\u305f\u3061\u306f\u30d3\u30b8\u30e7\u30f3\u3001\u30c7\u30fc\u30bf\u3001\u76f4\u611f\u306b\u57fa\u3065\u3044\u3066\u610f\u601d\u6c7a\u5b9a\u3092\u884c\u3046\u3002\u3057\u304b\u3057\u3001\u5b58\u7d9a\u306e\u305f\u3081\u306e\u6700\u3082\u91cd\u8981\u306a\u8981\u56e0\u306f\u3001\u7af6\u4e89\u74b0\u5883\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306b\u3042\u308b\u3002\u3053\u3053\u306b\u30d5\u30a1\u30a4\u30d6\u30d5\u30a9\u30fc\u30b9\u30e2\u30c7\u30eb\u304c\u767b\u5834\u3059\u308b\u3002\u30de\u30a4\u30b1\u30eb\u30fb\u30dd\u30fc\u30bf\u30fc\u304c\u958b\u767a\u3057\u305f\u3053\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306f\u3001\u696d\u754c\u5185\u306e\u7af6\u4e89\u306e\u6fc0\u3057\u3055\u3092\u69cb\u9020\u7684\u306b\u5206\u6790\u3059\u308b\u624b\u6bb5\u3092\u63d0\u4f9b\u3059\u308b\u3002\u3057\u304b\u3057\u3001\u30e2\u30c7\u30eb\u3092\u77e5\u3063\u3066\u3044\u308b\u3060\u3051\u3067\u306f\u4e0d\u5341\u5206\u3060\u3002\u771f\u306e\u4fa1\u5024\u306f\u3001\u5927\u4f01\u696d\u3092\u6c88\u6ca1\u3055\u305b\u305f\u7f60\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001\u305d\u308c\u3092\u6b63\u3057\u304f\u9069\u7528\u3059\u308b\u3053\u3068\u306b\u3042\u308b\u3002<\/p>\n<p>\u591a\u304f\u306e\u6226\u7565\u7684\u5931\u6557\u306f\u3001\u5e02\u5834\u306b\u5bfe\u3059\u308b\u9759\u7684\u306a\u898b\u65b9\u304b\u3089\u751f\u3058\u308b\u3002\u4f01\u696d\u306f\u73fe\u5728\u306e\u7af6\u5408\u306b\u6ce8\u76ee\u3057\u3001\u81ea\u793e\u306e\u30d3\u30b8\u30cd\u30b9\u30e2\u30c7\u30eb\u3092\u4e00\u6669\u3067\u5d29\u58ca\u3055\u305b\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u8981\u56e0\u3092\u7121\u8996\u3057\u3066\u3044\u308b\u3002\u30dd\u30fc\u30bf\u30fc\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u901a\u3057\u3066\u6b74\u53f2\u7684\u306a\u5931\u6557\u3092\u691c\u8a3c\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u5b9a\u306e\u8b66\u544a\u30b5\u30a4\u30f3\u3092\u7279\u5b9a\u3067\u304d\u308b\u3002\u3053\u306e\u30ac\u30a4\u30c9\u306f\u3001\u30e2\u30c7\u30eb\u306e\u4ed5\u7d44\u307f\u3092\u89e3\u660e\u3057\u3001\u74b0\u5883\u3092\u904e\u5c0f\u8a55\u4fa1\u3057\u305f\u4f01\u696d\u304b\u3089\u5b9f\u884c\u53ef\u80fd\u306a\u6559\u8a13\u3092\u62bd\u51fa\u3059\u308b\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Line art infographic illustrating Porter's Five Forces Model with central pentagon diagram showing Threat of New Entrants, Supplier Power, Buyer Power, Threat of Substitutes, and Competitive Rivalry, plus case study icons of Blockbuster, Kodak, retail, and Nokia failures, and a 5-step application process flowchart for strategic analysis\" decoding=\"async\" src=\"https:\/\/www.booksofall.com\/wp-content\/uploads\/2026\/04\/porter-five-forces-model-failed-strategies-infographic-line-art.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83d\udd0d \u30d5\u30a1\u30a4\u30d6\u30d5\u30a9\u30fc\u30b9\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u7406\u89e3 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\ud83d\udcf1<\/h3>\n<p>\u30ce\u30ad\u30a2\u306f\u96fb\u8a71\u6a5f\u5e02\u5834\u3092\u652f\u914d\u3057\u3066\u3044\u305f\u304c\u3001iPhone\u3068Android\u306b\u6557\u308c\u305f\u3002<\/p>\n<ul>\n<li><strong>\u7af6\u4e89\u306e\u6fc0\u5316\uff1a<\/strong>\u5f7c\u3089\u306f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u3088\u308a\u3082\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u8010\u4e45\u6027\u306b\u6ce8\u529b\u3057\u305f\u3002<\/li>\n<li><strong>\u4ee3\u66ff\u54c1\u306e\u8105\u5a01\uff1a<\/strong>\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u304c\u6a5f\u80fd\u96fb\u8a71\u3092\u7f6e\u304d\u63db\u3048\u3001\u4e3b\u306a\u901a\u4fe1\u6a5f\u5668\u3068\u306a\u3063\u305f\u3002<\/li>\n<li><strong>\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u306e\u529b\uff1a<\/strong>\u30a2\u30d7\u30ea\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u304c\u88fd\u54c1\u305d\u306e\u3082\u306e\u3068\u306a\u3063\u305f\u3002\u30ce\u30ad\u30a2\u306f\u958b\u767a\u8005\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u652f\u914d\u3057\u3066\u3044\u306a\u304b\u3063\u305f\u3002<\/li>\n<li><strong>\u7d50\u679c\u3068\u3057\u3066\uff1a<\/strong>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u54c1\u8cea\u3088\u308a\u3082\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3068\u30a2\u30d7\u30ea\u306e\u53ef\u7528\u6027\u304c\u91cd\u8981\u3060\u3063\u305f\u3002\u5f7c\u3089\u306f\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u7af6\u4e89\u306e\u529b\u3092\u8aa4\u8a8d\u3057\u305f\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udcca \u529b\u306e\u7a2e\u985e\u5225\u5931\u6557\u6307\u6a19\u306e\u6bd4\u8f03 \ud83d\udcca<\/h2>\n<p>\u3053\u308c\u3089\u306e\u6559\u8a13\u3092\u3088\u308a\u660e\u78ba\u306b\u3059\u308b\u305f\u3081\u306b\u3001\u5404\u529b\u306b\u5bfe\u3057\u3066\u4e00\u822c\u7684\u306a\u5931\u6557\u306e\u5146\u5019\u3092\u5206\u985e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u529b<\/th>\n<th>\u5931\u6557\u306e\u5146\u5019<\/th>\n<th>\u6226\u7565\u7684\u5bfe\u5fdc<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u65b0\u898f\u53c2\u5165\u306e\u8105\u5a01<\/strong><\/td>\n<td>\u30a4\u30ce\u30d9\u30fc\u30b7\u30e7\u30f3\u306e\u505c\u6ede\uff1b\u30ec\u30ac\u30b7\u30fc\u30a4\u30f3\u30d5\u30e9\u3078\u306e\u4f9d\u5b58<\/td>\n<td>\u77e5\u7684\u8ca1\u7523\u6a29\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u52b9\u679c\u3092\u901a\u3058\u3066\u8b77\u5cb8\u3092\u7bc9\u304f<\/td>\n<\/tr>\n<tr>\n<td><strong>\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u306e\u529b<\/strong><\/td>\n<td>\u5358\u4e00\u4f9b\u7d66\u6e90\u3078\u306e\u4f9d\u5b58\uff1b\u5165\u529b\u30b3\u30b9\u30c8\u306e\u4e0a\u6607<\/td>\n<td>\u30b5\u30d7\u30e9\u30a4\u30c1\u30a7\u30fc\u30f3\u306e\u591a\u69d8\u5316\uff1b\u7e26\u4e00\u4f53\u5316<\/td>\n<\/tr>\n<tr>\n<td><strong>\u8cb7\u3044\u624b\u306e\u529b<\/strong><\/td>\n<td>\u4fa1\u683c\u3078\u306e\u611f\u53d7\u6027\u306e\u5897\u52a0\uff1b\u5207\u308a\u66ff\u3048\u30b3\u30b9\u30c8\u306e\u4f4e\u3055<\/td>\n<td>\u30d6\u30e9\u30f3\u30c9\u30ed\u30a4\u30e4\u30eb\u30c6\u30a3\u306e\u5f37\u5316\uff1b\u5207\u308a\u66ff\u3048\u30b3\u30b9\u30c8\u306e\u5897\u52a0<\/td>\n<\/tr>\n<tr>\n<td><strong>\u4ee3\u66ff\u54c1\u306e\u8105\u5a01<\/strong><\/td>\n<td>\u5e02\u5834\u9700\u8981\u304c\u696d\u754c\u5916\u306e\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3078\u30b7\u30d5\u30c8<\/td>\n<td>\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u5185\u3067\u306e\u30a4\u30ce\u30d9\u30fc\u30b7\u30e7\u30f3\uff1b\u63d0\u4f9b\u54c1\u306e\u8ee2\u63db<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7af6\u4e89\u306e\u6fc0\u5316<\/strong><\/td>\n<td>\u4fa1\u683c\u6226\u4e89\uff1b\u5229\u76ca\u7387\u306e\u4f4e\u4e0b\uff1b\u5546\u54c1\u5316<\/td>\n<td>\u5dee\u5225\u5316\u3078\u306e\u6ce8\u529b\uff1b\u30cb\u30c3\u30c1\u30bf\u30fc\u30b2\u30c6\u30a3\u30f3\u30b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83d\udee0\ufe0f \u30e2\u30c7\u30eb\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u65b9\u6cd5 \ud83d\udee0\ufe0f<\/h2>\n<p>\u5206\u6790\u3092\u884c\u3046\u3053\u3068\u306f\u3001\u53b3\u5bc6\u3055\u3092\u8981\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u4e00\u5ea6\u304d\u308a\u306e\u4f5c\u696d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5e02\u5834\u306f\u5909\u5316\u3057\u3001\u529b\u306e\u30d0\u30e9\u30f3\u30b9\u3082\u79fb\u308a\u5909\u308f\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u3053\u306e\u30e2\u30c7\u30eb\u3092\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u69cb\u9020\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d71\uff1a\u696d\u754c\u306e\u7bc4\u56f2\u3092\u5b9a\u7fa9\u3059\u308b \ud83c\udf0d<\/h3>\n<p>\u81ea\u793e\u306e\u696d\u754c\u3092\u6b63\u78ba\u306b\u5b9a\u7fa9\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u81ea\u52d5\u8eca\u30e1\u30fc\u30ab\u30fc\u3067\u3042\u308c\u3070\u3001\u4ed6\u306e\u81ea\u52d5\u8eca\u30e1\u30fc\u30ab\u30fc\u3001\u30e9\u30a4\u30c9\u30b7\u30a7\u30a2\u30ea\u30f3\u30b0\u30b5\u30fc\u30d3\u30b9\u3001\u307e\u305f\u306f\u516c\u5171\u4ea4\u901a\u6a5f\u95a2\u3068\u7af6\u5408\u3057\u3066\u3044\u308b\u3067\u3057\u3087\u3046\u304b\uff1f\u7bc4\u56f2\u3092\u5e83\u3052\u308b\u3053\u3068\u3067\u3001\u96a0\u308c\u305f\u8105\u5a01\u304c\u660e\u3089\u304b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d72\uff1a\u5404\u529b\u306b\u95a2\u3059\u308b\u30c7\u30fc\u30bf\u3092\u53ce\u96c6\u3059\u308b \ud83d\udcdd<\/h3>\n<p>\u5e02\u5834\u30b7\u30a7\u30a2\u3001\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u306e\u96c6\u4e2d\u5ea6\u3001\u9867\u5ba2\u6e80\u8db3\u5ea6\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u53ce\u96c6\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u73fe\u5728\u306e\u72b6\u6cc1\u3060\u3051\u3067\u306a\u304f\u3001\u6642\u9593\u306e\u7d4c\u904e\u306b\u4f34\u3046\u30c8\u30ec\u30f3\u30c9\u3082\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u8ca1\u52d9\u5831\u544a\u66f8\u3001\u696d\u754c\u8a8c\u3001\u9867\u5ba2\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u6d3b\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d73\uff1a\u5f37\u5ea6\u3092\u8a55\u4fa1\u3059\u308b \ud83d\udcc9<\/h3>\n<p>\u5404\u529b\u306e\u5f37\u5ea6\u3092\u9ad8\u3001\u4e2d\u3001\u4f4e\u306e\u3044\u305a\u308c\u304b\u3067\u8a55\u4fa1\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6b63\u76f4\u306b\u3002\u7af6\u4e89\u304c\u6fc0\u3057\u3044\u3068\u611f\u3058\u305f\u3089\u3001\u305d\u308c\u3092\u8efd\u8996\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u9ad8\u5f37\u5ea6\u306f\u5229\u76ca\u7387\u306e\u4f4e\u4e0b\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d74\uff1a\u6226\u7565\u7684\u30ec\u30d0\u30fc\u3092\u7279\u5b9a\u3059\u308b \ud83c\udfaf<\/h3>\n<p>\u529b\u306e\u72b6\u6cc1\u3092\u628a\u63e1\u3057\u305f\u5f8c\u3001\u4f55\u306b\u884c\u52d5\u3067\u304d\u308b\u304b\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u306e\u529b\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3057\u3087\u3046\u304b\uff1f\u8cb7\u3044\u624b\u306e\u5207\u308a\u66ff\u3048\u30b3\u30b9\u30c8\u3092\u5897\u3084\u3059\u3053\u3068\u306f\u53ef\u80fd\u3067\u3057\u3087\u3046\u304b\uff1f\u65b0\u898f\u53c2\u5165\u306e\u969c\u58c1\u3092\u8a2d\u3051\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d75\uff1a\u7d99\u7d9a\u7684\u306b\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3059\u308b \ud83d\udd04<\/h3>\n<p>\u5206\u6790\u3092\u5b9a\u671f\u7684\u306b\u898b\u76f4\u3059\u4ed5\u7d44\u307f\u3092\u69cb\u7bc9\u3059\u308b\u3002\u56db\u534a\u671f\u3054\u3068\u307e\u305f\u306f\u5e742\u56de\u306b\u4e00\u5ea6\u3001\u529b\u306e\u72b6\u6cc1\u304c\u5909\u5316\u3057\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b\u3002\u6280\u8853\u306f\u6025\u901f\u306b\u9032\u5316\u3059\u308b\u305f\u3081\u3001\u4eca\u65e5\u4f4e\u3044\u53c2\u5165\u969c\u58c1\u304c\u660e\u65e5\u306f\u9ad8\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3057\u3001\u305d\u306e\u9006\u3082\u307e\u305f\u7136\u308a\u3067\u3042\u308b\u3002<\/p>\n<h2>\u26a0\ufe0f \u6226\u7565\u5206\u6790\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74 \u26a0\ufe0f<\/h2>\n<p>\u6b63\u3057\u3044\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u6301\u3063\u3066\u3044\u3066\u3082\u3001\u8aa4\u308a\u306f\u767a\u751f\u3059\u308b\u3002\u3053\u308c\u3089\u306e\u8aa4\u308a\u306f\u3001\u524d\u8ff0\u306e\u4f01\u696d\u306e\u5931\u6557\u3068\u4f3c\u305f flawed 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