{"id":154,"date":"2026-11-01T09:14:50","date_gmt":"2026-11-01T00:14:50","guid":{"rendered":"https:\/\/brandagent.jp\/en_blog\/japan-patent-benefits\/"},"modified":"2026-11-02T16:33:54","modified_gmt":"2026-11-02T07:33:54","slug":"japan-patent-benefits","status":"publish","type":"post","link":"https:\/\/brandagent.jp\/en_blog\/japan-patent-benefits\/","title":{"rendered":"Why Foreign Companies Should Get a Patent in Japan: Benefits Explained by a Japanese Patent Attorney"},"content":{"rendered":"<p><span style=\"font-size: 120%;\">&#8220;We already have a patent in China. Do we really need one in Japan?&#8221; &#8220;Is a Japanese patent worth it for a mid-sized manufacturer?&#8221;<\/span><\/p>\n<p><span style=\"font-size: 120%;\">Our honest answer: if you sell, manufacture or license your product in Japan, the real question is not whether a Japanese patent is worth having \u2014 it is what happens when a competitor copies you there and you have no right to stop them.<\/span><\/p>\n<p><span style=\"font-size: 120%;\">In this article, Japanese Patent Attorney Toru Kano of BrandAgent (Kyoto) explains the practical benefits of a Japanese patent for overseas companies, why structural patents are particularly strong, and how to bring your invention into Japan.<\/span><\/p>\n<div class=\"st-mybox st-mybox-class\" style=\"margin: 18px 0; padding: 16px; border: 2px solid #e5e7eb; border-radius: 10px; background: #fafafa;\">\n<p><span style=\"font-size: 120%;\"><strong>What you will learn<\/strong><\/span><\/p>\n<ul style=\"margin: 10px 0 0 18px;\">\n<li><span style=\"font-size: 120%;\">Why your home-country patent does not protect you in Japan<\/span><\/li>\n<li><span style=\"font-size: 120%;\">Four direct benefits of a Japanese patent<\/span><\/li>\n<li><span style=\"font-size: 120%;\">Why structural (product\/apparatus) patents are easy to enforce<\/span><\/li>\n<li><span style=\"font-size: 120%;\">How to enter Japan: Paris priority, PCT national phase, utility model<\/span><\/li>\n<li><span style=\"font-size: 120%;\">What to watch out for before you file<\/span><\/li>\n<\/ul>\n<\/div>\n<h2><span style=\"font-size: 120%;\">Your home-country patent does not work in Japan<\/span><\/h2>\n<p><span style=\"font-size: 120%;\">Patents are territorial. A patent granted in China, Korea, Taiwan, the US or Europe has no effect in Japan. If a competitor makes, sells or imports a copy of your product in Japan, you can only stop them with a <strong>Japanese<\/strong> patent (or Japanese utility model).<\/span><\/p>\n<p><span style=\"font-size: 120%;\">This matters for many overseas companies:<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 120%;\"><strong>E-commerce sellers<\/strong> on Amazon Japan, Rakuten or Yahoo! Shopping whose best-selling product is copied by other sellers.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>B2B suppliers<\/strong> selling machines, parts or materials to Japanese manufacturers.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>OEM \/ ODM manufacturers<\/strong> whose designs could be reproduced by another factory for the Japanese market.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>Technology owners<\/strong> who want to license their invention to a Japanese partner.<\/span><\/li>\n<\/ul>\n<div class=\"st-mybox  has-title st-mybox-class\" style=\"background:#ffebee;border-color:#ef9a9a;border-width:2px;border-radius:5px;margin: 25px 0 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#ef5350;font-weight:bold;text-shadow: #fff 3px 0px 0px, #fff 2.83487px 0.981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff 0.705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px 0.42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff 0.850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;\"><i class=\"fa fa-check-circle st-css-no\" aria-hidden=\"true\"><\/i>Note<\/p><div class=\"st-in-mybox\">\n<p><span style=\"font-size: 120%;\">Japan is a first-to-file country, and there are strict deadlines for claiming the priority of your home application. If you miss them and your invention has already been published, you may no longer be able to obtain a Japanese patent at all.<\/span><\/p>\n<\/div><\/div>\n<h2><span style=\"font-size: 120%;\">Four benefits of a Japanese patent<\/span><\/h2>\n<div class=\"st-mybox  has-title st-mybox-class\" style=\"background:#f1f8e9;border-color:#a5d6a7;border-width:2px;border-radius:5px;margin: 25px 0 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#4caf50;font-weight:bold;text-shadow: #fff 3px 0px 0px, #fff 2.83487px 0.981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff 0.705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px 0.42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff 0.850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;\"><i class=\"fa fa-check-circle st-css-no\" aria-hidden=\"true\"><\/i>Main benefits<\/p><div class=\"st-in-mybox\">\n<ul>\n<li><span style=\"font-size: 120%;\">\u2460 Legally stop copies in the Japanese market<\/span><\/li>\n<li><span style=\"font-size: 120%;\">\u2461 Prove your technology to Japanese customers and partners<\/span><\/li>\n<li><span style=\"font-size: 120%;\">\u2462 Earn income through licensing or assignment<\/span><\/li>\n<li><span style=\"font-size: 120%;\">\u2463 Stand out from competitors and avoid price wars<\/span><\/li>\n<\/ul>\n<\/div><\/div>\n<h3><span style=\"font-size: 120%;\">\u2460 Legally stop copies \u2014 structural patents are especially strong<\/span><\/h3>\n<p><span style=\"font-size: 120%;\">The core purpose of a patent is to stop others from using your invention without permission. In Japan, the patent owner has the exclusive right to work the patented invention, including making, using, selling and importing the patented product, and can seek an injunction and damages against an infringer.<\/span><\/p>\n<p><span style=\"font-size: 120%;\">We want to emphasise one practical point: <strong>structural patents<\/strong> \u2014 patents on the structure of a product, the arrangement of its parts, or the combination of mechanisms \u2014 are particularly effective.<\/span><\/p>\n<div class=\"st-mybox  has-title st-mybox-class\" style=\"background:#f1f8e9;border-color:#a5d6a7;border-width:2px;border-radius:5px;margin: 25px 0 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#4caf50;font-weight:bold;text-shadow: #fff 3px 0px 0px, #fff 2.83487px 0.981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff 0.705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px 0.42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff 0.850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;\"><i class=\"fa fa-check-circle st-css-no\" aria-hidden=\"true\"><\/i>Why structural patents are easy to enforce<\/p><div class=\"st-in-mybox\">\n<p><span style=\"font-size: 120%;\">For software or business-method patents, proving infringement often means comparing how a system is used or how data is processed, which can be difficult to show. A structural patent, by contrast, covers the shape, arrangement and combination of physical parts. You can often judge infringement objectively by buying the competitor&#8217;s product, taking it apart and measuring it.<\/span><\/p>\n<p><span style=\"font-size: 120%;\">Because infringement is easier to prove, it is easier to act quickly \u2014 for example, by sending a warning, filing an infringement report with an online marketplace, or seeking an injunction.<\/span><\/p>\n<\/div><\/div>\n<p><span style=\"font-size: 120%;\">A Japanese patent owner can also apply to Japan Customs to have infringing goods stopped at import. For companies whose competitors manufacture abroad and ship into Japan, this is a valuable tool.<\/span><\/p>\n<h3><span style=\"font-size: 120%;\">\u2461 Prove your technology to Japanese customers and partners<\/span><\/h3>\n<p><span style=\"font-size: 120%;\">A patent is granted only after the Japan Patent Office (JPO) examines whether the invention is new and involves an inventive step. The patent is published, so anyone can check the owner, the inventors and the technology.<\/span><\/p>\n<p><span style=\"font-size: 120%;\">Japanese companies tend to value objective evidence when choosing suppliers and partners. A Japanese patent is a public record that tells customers, distributors and investors, &#8220;this technology is ours, and competitors cannot easily copy it.&#8221;<\/span><\/p>\n<h3><span style=\"font-size: 120%;\">\u2462 Earn income through licensing or assignment<\/span><\/h3>\n<p><span style=\"font-size: 120%;\">A patent is not only a right to use your invention \u2014 it is also a right to <strong>let others use it<\/strong> (licensing) and to <strong>sell it<\/strong> (assignment).<\/span><\/p>\n<p><span style=\"font-size: 120%;\">For overseas companies without their own sales network in Japan, licensing a Japanese patent to a local manufacturer or distributor can be a way to earn royalties in the Japanese market without building a factory or office. A Japanese patent can also be sold if you later withdraw from the market.<\/span><\/p>\n<h3><span style=\"font-size: 120%;\">\u2463 Stand out from competitors and avoid price wars<\/span><\/h3>\n<p><span style=\"font-size: 120%;\">A patent lets you show the market that a particular function or structure is available only from you. Customers who value that feature are less likely to switch to a cheaper copy, which helps you avoid price competition.<\/span><\/p>\n<p><span style=\"font-size: 120%;\">The existence of a patent also acts as a deterrent. A competitor who knows &#8220;this might infringe&#8221; will often think twice before launching a similar product, even if no lawsuit is ever filed.<\/span><\/p>\n<h2><span style=\"font-size: 120%;\">How to bring your invention into Japan<\/span><\/h2>\n<p><span style=\"font-size: 120%;\">Overseas applicants usually enter Japan through one of the following routes. An applicant without a domicile or office in Japan must file and handle all procedures through a representative in Japan \u2014 in practice, a Japanese patent attorney.<\/span><\/p>\n<table style=\"border-collapse: collapse; width: 100%;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 8px; background: #f3f6fa;\">Route<\/th>\n<th style=\"padding: 8px; background: #f3f6fa;\">Deadline<\/th>\n<th style=\"padding: 8px; background: #f3f6fa;\">Best for<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">Paris Convention priority<\/td>\n<td style=\"padding: 8px;\">Within 12 months of your first (home-country) filing<\/td>\n<td style=\"padding: 8px;\">When Japan is one of only a few target countries<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">PCT national phase<\/td>\n<td style=\"padding: 8px;\">Within 30 months of the priority date<\/td>\n<td style=\"padding: 8px;\">When you want more time to decide on countries<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Japanese utility model<\/td>\n<td style=\"padding: 8px;\">Same priority deadlines apply<\/td>\n<td style=\"padding: 8px;\">Structural inventions with a short product life<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-size: 120%;\">Your application must be translated into Japanese. The quality of this translation directly affects the scope of your Japanese patent, so it should be reviewed by someone who understands both the technology and Japanese patent practice.<\/span><\/p>\n<p><span style=\"font-size: 120%;\">After filing, a <strong>request for examination<\/strong> must be filed within 3 years of the Japanese filing date; otherwise the application is deemed withdrawn. If you already have an allowed patent in another office, the Patent Prosecution Highway (PPH) can be used to speed up examination in Japan.<\/span><\/p>\n<p><span style=\"font-size: 120%;\">A <strong>Japanese utility model<\/strong> protects the shape, structure or combination of articles. It is registered without substantive examination, so it is obtained quickly and at lower cost, but its term is shorter (10 years from filing), and before enforcing it you must obtain and present a technical opinion from the JPO. It can be a practical option for simple structural products.<\/span><\/p>\n<h2><span style=\"font-size: 120%;\">Points to check before you file<\/span><\/h2>\n<div class=\"st-mybox  has-title st-mybox-class\" style=\"background:#ffebee;border-color:#ef9a9a;border-width:2px;border-radius:5px;margin: 25px 0 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#ef5350;font-weight:bold;text-shadow: #fff 3px 0px 0px, #fff 2.83487px 0.981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff 0.705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px 0.42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff 0.850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;\"><i class=\"fa fa-check-circle st-css-no\" aria-hidden=\"true\"><\/i>Five things to watch out for<\/p><div class=\"st-in-mybox\">\n<ul>\n<li><span style=\"font-size: 120%;\"><strong>Do not miss the priority deadline:<\/strong> 12 months (Paris) or 30 months (PCT). Product launches, trade shows and online listings can destroy novelty.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>Check prior art:<\/strong> searching for similar patents before filing saves time and money.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>The claims decide the strength of the right:<\/strong> if the claims are too narrow, competitors can design around them; if too broad, the application is rejected.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>Plan for the whole cost:<\/strong> examination fees, Office Action responses and annual fees continue after filing. File for &#8220;patents you will actually use&#8221;, not just &#8220;patents you can get&#8221;.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>Manage the patent after grant:<\/strong> pay annual fees on time and watch the market for infringing products.<\/span><\/li>\n<\/ul>\n<\/div><\/div>\n<h2><span style=\"font-size: 120%;\">FAQ<\/span><\/h2>\n<ul>\n<li><span style=\"font-size: 120%;\"><strong>Q. We have a Chinese patent. Does it protect us in Japan?<\/strong><br \/>\nA. No. Patents are territorial. To stop copies in Japan you need a Japanese patent or utility model.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>Q. Can we file in Japan directly without a Japanese attorney?<\/strong><br \/>\nA. An applicant with no domicile or office in Japan must use a representative in Japan for filing and all later procedures \u2014 in practice, a Japanese patent attorney.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>Q. How long does a Japanese patent last?<\/strong><br \/>\nA. Up to 20 years from the filing date, provided the annual fees are paid. (Extension is possible in limited fields such as pharmaceuticals.)<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>Q. Is a utility model enough?<\/strong><br \/>\nA. For simple structural products it can be a fast, low-cost option, but it is shorter (10 years) and requires a JPO technical opinion before enforcement. We recommend discussing it case by case.<\/span><\/li>\n<li><span style=\"font-size: 120%;\"><strong>Q. Can we communicate in English or Chinese?<\/strong><br \/>\nA. Yes. We handle inquiries in English and Chinese.<\/span><\/li>\n<\/ul>\n<h2><span style=\"font-size: 120%;\">Summary<\/span><\/h2>\n<div class=\"st-mybox  has-title st-mybox-class\" style=\"background:#f1f8e9;border-color:#a5d6a7;border-width:2px;border-radius:5px;margin: 25px 0 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#4caf50;font-weight:bold;text-shadow: #fff 3px 0px 0px, #fff 2.83487px 0.981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff 0.705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px 0.42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff 0.850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;\"><i class=\"fa fa-check-circle st-css-no\" aria-hidden=\"true\"><\/i>Key points<\/p><div class=\"st-in-mybox\">\n<ul>\n<li><span style=\"font-size: 120%;\">Your home-country patent does not protect you in Japan.<\/span><\/li>\n<li><span style=\"font-size: 120%;\">A Japanese patent lets you stop copies, prove your technology, license it and stand out from competitors.<\/span><\/li>\n<li><span style=\"font-size: 120%;\">Structural patents are easy to prove and therefore easy to enforce.<\/span><\/li>\n<li><span style=\"font-size: 120%;\">Enter Japan within 12 months (Paris) or 30 months (PCT) of your priority date.<\/span><\/li>\n<li><span style=\"font-size: 120%;\">Every case is handled personally by a licensed Japanese patent attorney.<\/span><\/li>\n<\/ul>\n<\/div><\/div>\n<h2 id=\"related-articles\"><span style=\"font-size: 120%;\">Related articles<\/span><\/h2>\n<ul>\n<li><span style=\"font-size: 120%;\"><a href=\"https:\/\/brandagent.jp\/en_blog\/how-to-file-a-patent-in-japan\/\">How to Get a Patent in Japan as a Foreign Applicant: Documents, Routes and Process<\/a><\/span><\/li>\n<li><span style=\"font-size: 120%;\"><a href=\"https:\/\/brandagent.jp\/en_blog\/japan-patent-cost\/\">How Much Does a Japanese Patent Cost? Official JPO Fees for Foreign Applicants (2026)<\/a><\/span><\/li>\n<li><span style=\"font-size: 120%;\"><a href=\"https:\/\/brandagent.jp\/en_blog\/japan-patent-infringement\/\">Patent Infringement in Japan: How to Check Your Risk and Respond to a Warning Letter<\/a><\/span><\/li>\n<li><span style=\"font-size: 120%;\"><a href=\"https:\/\/brandagent.jp\/en_blog\/japan-trademark-vs-patent-design-copyright\/\">Trademark vs Patent vs Design vs Copyright in Japan: What Each One Protects<\/a><\/span><\/li>\n<\/ul>\n<div style=\"background-color: #f0f7ff; border: 2px solid #0066cc; padding: 20px; margin: 24px 0; border-radius: 6px;\">\n<p><span style=\"font-size: 120%;\"><strong>Planning to protect your invention in Japan?<\/strong><br \/>\nTell us about your invention and your home-country filing \u2014 we will tell you the best route into Japan and the deadlines that apply.<\/span><\/p>\n<p><span style=\"font-size: 120%;\">BrandAgent Patent Office (Kyoto, Japan)<br \/>\nToru Kano, Japanese Patent Attorney<\/span><\/p>\n<p><a style=\"color: #0066cc; font-weight: bold;\" href=\"https:\/\/brandagent.jp\/en\/home\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-size: 120%;\">Ask a Japanese patent attorney \u2014 visit BrandAgent&#8217;s English site<\/span><\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Selling, manufacturing or licensing in Japan? A Japanese patent attorney explains why your home-country patent is not enough, what a Japanese patent lets you do, why structural patents are strong, and how to enter Japan via Paris or PCT.<\/p>\n","protected":false},"author":1,"featured_media":323,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-154","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-patents"],"_links":{"self":[{"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/posts\/154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/comments?post=154"}],"version-history":[{"count":1,"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/posts\/154\/revisions"}],"predecessor-version":[{"id":231,"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/posts\/154\/revisions\/231"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/media\/323"}],"wp:attachment":[{"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/media?parent=154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/categories?post=154"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/brandagent.jp\/en_blog\/wp-json\/wp\/v2\/tags?post=154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}