{"id":50910,"date":"2026-03-29T20:29:35","date_gmt":"2026-03-29T20:29:35","guid":{"rendered":"https:\/\/alienroad.com\/%e6%9c%aa%e5%88%86%e9%a1%9e\/what-is-a-subdomain\/"},"modified":"2026-03-29T20:29:35","modified_gmt":"2026-03-29T20:29:35","slug":"what-is-a-subdomain","status":"publish","type":"post","link":"https:\/\/alienroad.com\/ja\/seo-2\/what-is-a-subdomain\/","title":{"rendered":"what-is-a-subdomain (Japanese)"},"content":{"rendered":"<h1 class=\"sc-906ec12e-0 ZsEzQ sc-e22c6ef-5 hZLKKf\" data-test=\"heading-text\"> <\/h1>\n<h2 id=\"what-is-a-subdomain\"><\/h2>\n<h2 id=\"understanding-url-structure\">URL<\/h2>\n<p>URLHTTPHTTPS<\/p>\n<p>2<\/p>\n<ul>\n<li>SLD<\/li>\n<\/ul>\n<ul>\n<li>TLD.com.org<\/li>\n<\/ul>\n<figure class=\"easyimage easyimage-side\"><picture><source srcset=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/fa\/70\/fa70fafcbf91927caa27d6d418d83aa1\/DAbuObld0fGkGEbqKHvk1WfxpvwMZyEKjjCq5lQHI9Ho9QaVDVNbGDjo3JmBz0C1myWtRCpWL7ntbOsP3PIaag-ypFsFZuab-mEGyzTtToDS1771QzBnZXwujfHFXrNCsCsScBKkqVwdzN0R9gSE0-Q.webp\" type=\"image\/webp\" \/><img fetchpriority=\"high\" decoding=\"async\" class=\"ls-is-cached lazyloaded zooming\" src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/fa\/70\/fa70fafcbf91927caa27d6d418d83aa1\/DAbuObld0fGkGEbqKHvk1WfxpvwMZyEKjjCq5lQHI9Ho9QaVDVNbGDjo3JmBz0C1myWtRCpWL7ntbOsP3PIaag-ypFsFZuab-mEGyzTtToDS1771QzBnZXwujfHFXrNCsCsScBKkqVwdzN0R9gSE0-Q.png\" alt=\"URL\" width=\"1010\" height=\"514\" data-original=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/fa\/70\/fa70fafcbf91927caa27d6d418d83aa1\/original.png\" data-src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/fa\/70\/fa70fafcbf91927caa27d6d418d83aa1\/DAbuObld0fGkGEbqKHvk1WfxpvwMZyEKjjCq5lQHI9Ho9QaVDVNbGDjo3JmBz0C1myWtRCpWL7ntbOsP3PIaag-ypFsFZuab-mEGyzTtToDS1771QzBnZXwujfHFXrNCsCsScBKkqVwdzN0R9gSE0-Q.png\" data- title=\"\"><\/picture><\/figure>\n<p>wwwworld wide web\u2014<\/p>\n<p>Googlewww.google.comGoogle<\/p>\n<p>GoogleGoogledocs.google.comGoogle Docsads.google.comGoogle Ads<\/p>\n<figure class=\"easyimage easyimage-side\"><picture><source srcset=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/18\/03\/1803a27a2311a35f3de92e74432f4dc3\/PlqAZwaVBZ9IPTN9Nxz-1IRXOHQTzOjWx4t5iC2x6ksDrx8KRYMDAVvzc_nqKNMlHpovLiuIEGRjNVx2pG7uP95mjNCmhIpzBCzYRxpSLKhSUVhTHkFnllaLE5LY_wV_OFMvUvsWP6wu0TiFxsmoygA.webp\" type=\"image\/webp\" \/><img decoding=\"async\" class=\"zooming lazyloaded\" src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/18\/03\/1803a27a2311a35f3de92e74432f4dc3\/PlqAZwaVBZ9IPTN9Nxz-1IRXOHQTzOjWx4t5iC2x6ksDrx8KRYMDAVvzc_nqKNMlHpovLiuIEGRjNVx2pG7uP95mjNCmhIpzBCzYRxpSLKhSUVhTHkFnllaLE5LY_wV_OFMvUvsWP6wu0TiFxsmoygA.png\" alt=\"&quot;ads.google.com\/home\/&quot; \" width=\"1010\" height=\"228\" data-original=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/18\/03\/1803a27a2311a35f3de92e74432f4dc3\/original.png\" data-src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/18\/03\/1803a27a2311a35f3de92e74432f4dc3\/PlqAZwaVBZ9IPTN9Nxz-1IRXOHQTzOjWx4t5iC2x6ksDrx8KRYMDAVvzc_nqKNMlHpovLiuIEGRjNVx2pG7uP95mjNCmhIpzBCzYRxpSLKhSUVhTHkFnllaLE5LY_wV_OFMvUvsWP6wu0TiFxsmoygA.png\" data- title=\"\"><\/picture><\/figure>\n<p>Google distractions Google<\/p>\n<figure class=\"easyimage easyimage-side\"><picture><source srcset=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/2a\/03\/2a030392fd81cca8a9040f707bbb041c\/6q7N0rtBsQaN2E4N3saXQmqC1BCIgMZaFfZdXS6taXnQ9cVm0ul_nIQZen3F38lFE7vuixmHqbnUok_GPR9rBuI7DFrvDoZ_ZnP10YDyIizSTrstaXHSb7wFNr9Aj5CQ0-NLUSswzeyJ3cBugS2pDnk.webp\" type=\"image\/webp\" \/><img decoding=\"async\" class=\"zooming lazyloaded\" src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/2a\/03\/2a030392fd81cca8a9040f707bbb041c\/6q7N0rtBsQaN2E4N3saXQmqC1BCIgMZaFfZdXS6taXnQ9cVm0ul_nIQZen3F38lFE7vuixmHqbnUok_GPR9rBuI7DFrvDoZ_ZnP10YDyIizSTrstaXHSb7wFNr9Aj5CQ0-NLUSswzeyJ3cBugS2pDnk.png\" alt=\"Google\" width=\"1010\" height=\"427\" data-original=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/2a\/03\/2a030392fd81cca8a9040f707bbb041c\/original.png\" data-src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/2a\/03\/2a030392fd81cca8a9040f707bbb041c\/6q7N0rtBsQaN2E4N3saXQmqC1BCIgMZaFfZdXS6taXnQ9cVm0ul_nIQZen3F38lFE7vuixmHqbnUok_GPR9rBuI7DFrvDoZ_ZnP10YDyIizSTrstaXHSb7wFNr9Aj5CQ0-NLUSswzeyJ3cBugS2pDnk.png\" data- title=\"\"><\/picture><\/figure>\n<p>Google DocsGoogle AdsGoogle<\/p>\n<figure class=\"easyimage easyimage-side\"><picture><source srcset=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/e5\/d1\/e5d1592239dc9b63c97569491c751bf0\/unzVGtBaHdTHSESqWAH3SqiFAlc_SJ4cdb1wGqW_BAwRZTnehKw49sg3i6gs95Hnw6A_KhQkQchO7THlbinCckfjpwWWMe4bpvwn57TwoPY-YzsLZLQTO29EZfEdTZGlfSe7G7O3BRcw6ySixgHBGL8.webp\" type=\"image\/webp\" \/><img loading=\"lazy\" decoding=\"async\" class=\"zooming lazyloaded\" src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/e5\/d1\/e5d1592239dc9b63c97569491c751bf0\/unzVGtBaHdTHSESqWAH3SqiFAlc_SJ4cdb1wGqW_BAwRZTnehKw49sg3i6gs95Hnw6A_KhQkQchO7THlbinCckfjpwWWMe4bpvwn57TwoPY-YzsLZLQTO29EZfEdTZGlfSe7G7O3BRcw6ySixgHBGL8.png\" alt=\"Google Ads\" width=\"1010\" height=\"518\" data-original=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/e5\/d1\/e5d1592239dc9b63c97569491c751bf0\/original.png\" data-src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/e5\/d1\/e5d1592239dc9b63c97569491c751bf0\/unzVGtBaHdTHSESqWAH3SqiFAlc_SJ4cdb1wGqW_BAwRZTnehKw49sg3i6gs95Hnw6A_KhQkQchO7THlbinCckfjpwWWMe4bpvwn57TwoPY-YzsLZLQTO29EZfEdTZGlfSe7G7O3BRcw6ySixgHBGL8.png\" data- title=\"\"><\/picture><\/figure>\n<p>Google<\/p>\n<h2 id=\"subdomains-vs--subdirectories\"> vs. <\/h2>\n<ul>\n<li><strong><\/strong><\/li>\n<\/ul>\n<ul>\n<li><strong><\/strong><\/li>\n<\/ul>\n<p>CMS<\/p>\n<p>URL<strong>www.mypetstore.com\/blog<\/strong><\/p>\n<p>CMSWordPress<\/p>\n<p>URL<strong>blog.mypetstore.com\u00a0<\/strong><\/p>\n<p>URL<strong><\/strong><strong><\/strong><\/p>\n<p><strong>www.mypetstore.com\/blog\/pets<\/strong>  <strong>www.mypetstore.com\/blog\/pets\/dogs<\/strong><\/p>\n<p>ads.google.comhomehow it works<\/p>\n<figure class=\"easyimage easyimage-side\"><picture><source srcset=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/a1\/81\/a181a19465a664920c01d57d5567cd1a\/dh2jljSj0DHiqZ9IJpsOs8PqiYmP_8AyF8Vzr3IE3yFnCvnrlgEufVVoMjaQEK6nM9eblnlc9xV-w50ZgE5h5sV-giPUsUwg97aFw7jM_92qCBq4F9IkcoJpoV_qxleMS0KhYgR7b2TtZ5KXX0lHUB4.webp\" type=\"image\/webp\" \/><img loading=\"lazy\" decoding=\"async\" class=\"zooming lazyloaded\" src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/a1\/81\/a181a19465a664920c01d57d5567cd1a\/dh2jljSj0DHiqZ9IJpsOs8PqiYmP_8AyF8Vzr3IE3yFnCvnrlgEufVVoMjaQEK6nM9eblnlc9xV-w50ZgE5h5sV-giPUsUwg97aFw7jM_92qCBq4F9IkcoJpoV_qxleMS0KhYgR7b2TtZ5KXX0lHUB4.png\" alt=\"&quot;ads.google.com\/home\/how-it-works\/&quot;\" width=\"1010\" height=\"317\" data-original=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/a1\/81\/a181a19465a664920c01d57d5567cd1a\/original.png\" data-src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/a1\/81\/a181a19465a664920c01d57d5567cd1a\/dh2jljSj0DHiqZ9IJpsOs8PqiYmP_8AyF8Vzr3IE3yFnCvnrlgEufVVoMjaQEK6nM9eblnlc9xV-w50ZgE5h5sV-giPUsUwg97aFw7jM_92qCBq4F9IkcoJpoV_qxleMS0KhYgR7b2TtZ5KXX0lHUB4.png\" data- title=\"\"><\/picture><\/figure>\n<p>URL<\/p>\n<h3 id=\"should-you-use-a-subdomain-or-subdirectory\"><\/h3>\n<p>CMS<\/p>\n<p><strong>www.mypetstore.com<\/strong>www.mypetstore.com\/dog-food<\/p>\n<h2 id=\"when-to-use-subdomains\"><\/h2>\n<h3 id=\"creating-a-blog\"><\/h3>\n<p>Fiverr<\/p>\n<p>Fiverr<\/p>\n<figure class=\"easyimage easyimage-side\"><picture><source srcset=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/64\/c2\/64c2394c20dcda57046ddd5a79602c3f\/Dr0SWazDO-l4hS9fGyBTmrgGjCjTe0qNgQpVy1zxV-uNyee2AvCozxz8LDAd7uIZUm1DrOaW0y7vO00rZjDcCKouhiNpDuVuR92RNb6H6UC2EEGsKZbYys-OfTLGl83FX6bKpSHb3IPJYiJr7JQxQJA.webp\" type=\"image\/webp\" \/><img loading=\"lazy\" decoding=\"async\" class=\"zooming lazyloaded\" src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/64\/c2\/64c2394c20dcda57046ddd5a79602c3f\/Dr0SWazDO-l4hS9fGyBTmrgGjCjTe0qNgQpVy1zxV-uNyee2AvCozxz8LDAd7uIZUm1DrOaW0y7vO00rZjDcCKouhiNpDuVuR92RNb6H6UC2EEGsKZbYys-OfTLGl83FX6bKpSHb3IPJYiJr7JQxQJA.jpeg\" alt=\"&quot;blog.fiverr.com&quot;\" width=\"1010\" height=\"709\" data-original=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/64\/c2\/64c2394c20dcda57046ddd5a79602c3f\/original.jpeg\" data-src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/64\/c2\/64c2394c20dcda57046ddd5a79602c3f\/Dr0SWazDO-l4hS9fGyBTmrgGjCjTe0qNgQpVy1zxV-uNyee2AvCozxz8LDAd7uIZUm1DrOaW0y7vO00rZjDcCKouhiNpDuVuR92RNb6H6UC2EEGsKZbYys-OfTLGl83FX6bKpSHb3IPJYiJr7JQxQJA.jpeg\" data- title=\"\"><\/picture><\/figure>\n<p>Fiverr<\/p>\n<h3 id=\"adding-an-ecommerce-store\">E<\/h3>\n<p>E<\/p>\n<p>EWordPressShopifyWooCommerce<\/p>\n<p>Hubspot<\/p>\n<figure class=\"easyimage easyimage-side\"><picture><source srcset=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/99\/98\/9998e373b2d7440e1b70d01a58b2fc78\/uaa-XgteqxfEZ6aisdzVpOwACBpoRE2vhqPSoqK5oZhGOD50in1-t_55lYlBpIiY1x_tY0uqtQ3-pCk5VRYZJHciEwriydZpLm7lWxCzzOLyTZKVueYjLT6vTM4r85boKHswUJ4C5tf3nhdO5JKGgZA.webp\" type=\"image\/webp\" \/><img loading=\"lazy\" decoding=\"async\" class=\"zooming lazyloaded\" src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/99\/98\/9998e373b2d7440e1b70d01a58b2fc78\/uaa-XgteqxfEZ6aisdzVpOwACBpoRE2vhqPSoqK5oZhGOD50in1-t_55lYlBpIiY1x_tY0uqtQ3-pCk5VRYZJHciEwriydZpLm7lWxCzzOLyTZKVueYjLT6vTM4r85boKHswUJ4C5tf3nhdO5JKGgZA.jpeg\" alt=\"&quot;shop.hubspot.com\/Category&quot;\" width=\"1010\" height=\"600\" data-original=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/99\/98\/9998e373b2d7440e1b70d01a58b2fc78\/original.jpeg\" data-src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/99\/98\/9998e373b2d7440e1b70d01a58b2fc78\/uaa-XgteqxfEZ6aisdzVpOwACBpoRE2vhqPSoqK5oZhGOD50in1-t_55lYlBpIiY1x_tY0uqtQ3-pCk5VRYZJHciEwriydZpLm7lWxCzzOLyTZKVueYjLT6vTM4r85boKHswUJ4C5tf3nhdO5JKGgZA.jpeg\" data- title=\"\"><\/picture><\/figure>\n<h3 id=\"testing-or-building-a-new-website\"><\/h3>\n<p>Squarespace<\/p>\n<figure class=\"easyimage easyimage-side\"><picture><source srcset=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/f7\/90\/f790ae7b6a07441057ec183e6a0cb819\/39Zxf0wfikDhV5Qdwo3zZSDTpygXumqkJ29Vj4KeiUzqquM7aWD3PM3A4LVOXzl6zUFaXdWSqBcGMil\" type=\"image\/webp\" \/><img loading=\"lazy\" decoding=\"async\" class=\"zooming lazyloaded\" src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/f7\/90\/f790ae7b6a07441057ec183e6a0cb819\/39Zxf0wfikDhV5Qdwo3zZSDTpygXumqkJ29Vj4KeiUzqquM7aWD3PM3A4LVOXzl6zUFaXdWSqBcGMil.png\" alt=\"Squarespace\" width=\"1010\" height=\"514\" data-original=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/f7\/90\/f790ae7b6a07441057ec183e6a0cb819\/original.png\" data-src=\"https:\/\/static.semrush.com\/blog\/uploads\/media\/f7\/90\/f790ae7b6a07441057ec183e6a0cb819\/39Zxf0wfikDhV5Qdwo3zZSDTpygXumqkJ29Vj4KeiUzqquM7aWD3PM3A4LVOXzl6zUFaXdWSqBcGMil.png\" data- title=\"\"><\/picture><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>URL URLHTTPHTTPS 2 SLD TLD.com.org wwwworld wide web\u2014 Googlewww.google.comGoogle GoogleGoogledocs.google.comGo [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[1150,1151],"class_list":["post-50910","post","type-post","status-publish","format-standard","hentry","category-seo-2","tag-article","tag-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/50910","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/comments?post=50910"}],"version-history":[{"count":0,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/50910\/revisions"}],"wp:attachment":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/media?parent=50910"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/categories?post=50910"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/tags?post=50910"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}