{"id":16525,"date":"2026-10-01T09:00:27","date_gmt":"2026-10-01T00:00:27","guid":{"rendered":"https:\/\/www.rts-pv.com\/en\/?post_type=blogs&p=16525"},"modified":"2026-09-18T16:12:13","modified_gmt":"2026-09-18T07:12:13","slug":"curtailment-reduction-measures-for-renewable-energy-in-japan","status":"publish","type":"blogs","link":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/","title":{"rendered":"Curtailment Reduction Measures for Renewable Energy in Japan"},"content":{"rendered":"
\n
\n
\n
Japan Solar Update: No.220 (Sept 28 ~ Oct 2, 2026)<\/h6>\n<\/div>\n
<\/h6>\n<\/div>\n<\/div>\n

As renewable energy deployment continues to expand across Japan, output curtailment is becoming an increasingly important challenge.<\/p>\n

 <\/p>\n

<\/p>\n
<\/p>\n
Measures to reduce renewable
\nenergy output curtailment<\/div>\n

<\/p>\n

Calculations were made, assuming the implementation of demand measures,
\nsupply measures, and grid measures<\/div>\n<\/div>\n

<\/p>\n

<\/p>\n
\u2460<\/span> Demand measures:<\/span> It is assumed that storage batteries create demand equivalent to 10% of the minimum demand in each area, with a storage duration of six hours<\/span>.<\/div>\n

<\/p>\n

\u2461<\/span> Supply measures:<\/span> It is assumed that the minimum output of thermal and other power generation facilities is uniformly reduced to 30% for thermal power and 50% for biomass power<\/span>.<\/div>\n

<\/p>\n

\u2462<\/span> Grid measures:<\/span> Based on the master plan, it is assumed that interregional connection lines currently under planning are developed and reinforced<\/span> (Hokkaido \u21d4 Tohoku \u21d4 Tokyo: +2 GW, Kyushu \u21d4 Chugoku: +1 GW).<\/div>\n

<\/p>\n

\u2463<\/span> FIP transition case:<\/span> It is assumed that 25% of PV and wind power transitions to the FIP program, and that co-located battery storage capacity is 3 kWh per 1 kW of PV power generation and 0.64 kWh per 1 kW of wind power generation.<\/span><\/div>\n<\/div>\n

<\/p>\n

Figure 1\u00a0\u00a0 Estimates of Installed Capacities and Other Factors in the Long-Term Outlook on Renewable Energy Output Curtailment<\/div>\n

<\/p>\n

Source: Materials of the 12th meeting of the Working Group on Stable Electricity Supply (August 6, 2026), compiled by RTS Corporation<\/em><\/div>\n<\/div>\n

 <\/p>\n

\n

<Key points><\/span><\/span><\/span><\/strong><\/p>\n

    \n
  • As a result of calculating the output curtailment rate, Hokkaido showed a high rate of 37%; however, this was reduced to 24% through grid measures. In other areas, the curtailment rate was reduced through demand measures and supply measures<\/li>\n
  • The output curtailment rate after the review of the priority dispatch rules was calculated. In the FIP transition case, in which the FIP ratio is 25%, the results suggest that, after the change in dispatch order, the curtailment rate under the FIP program tends to decrease compared with that under the FIT program<\/li>\n<\/ul>\n<\/div>\n

     <\/p>\n

    \n

    \n

    Calculation Results for the Outlook on Renewable Energy Output Curtailment for FY 2035<\/p>\n<\/div>\n

    \n

    Output Curtailment Rates for PV and Wind Power under Unlimited, Uncompensated Rules<\/p>\n<\/div>\n

     <\/p>\n

     <\/p>\n

     <\/p>\n

    \"Curtailment<\/p>\n

     <\/p>\n

    \n

     <\/p>\n

    \n

    Calculation Results after the Review of the Priority Dispatch Rules<\/p>\n<\/div>\n

    \n

    \u00a0FIP transition case (FIP ratio: 25%) \u00a0 \u00a0 \u00a0<\/p>\n<\/div>\n

     <\/p>\n

     <\/p>\n

    \"Calculation<\/p>\n

     <\/p>\n

     <\/p>\n

    Figure 2 Summary of Calculation Results for the Long-Term Outlook on Renewable Energy Output Curtailment Source: Materials of the 12th meeting of the Working Group on Stable Electricity Supply (August 6, 2026), compiled by RTS Corporation<\/span><\/p>\n

     <\/p>\n","protected":false},"featured_media":16584,"template":"","blogs_category":[44],"class_list":["post-16525","blogs","type-blogs","status-publish","has-post-thumbnail","hentry","blogs_category-regulations-government-initiatives"],"acf":[],"yoast_head":"\nCurtailment Reduction Measures for Renewable Energy in Japan | RTS Corporation<\/title>\n<meta name=\"description\" content=\"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in RTS Corporation is a leading PV industry \/ market consultingcompany and has been supporting the growth of the PV industry for nearly 40 years.We provide an optimal consulting service for each client interested in the PV business.\u3000Weekly PV news is available at RTS PV Blog.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Curtailment Reduction Measures for Renewable Energy in Japan | RTS Corporation\" \/>\n<meta property=\"og:description\" content=\"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in RTS Corporation is a leading PV industry \/ market consultingcompany and has been supporting the growth of the PV industry for nearly 40 years.We provide an optimal consulting service for each client interested in the PV business.\u3000Weekly PV news is available at RTS PV Blog.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/\" \/>\n<meta property=\"og:site_name\" content=\"RTS Corporation\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.rts-pv.com\/en\/wp-content\/uploads\/sites\/3\/2026\/09\/Curtailment-rate-for-FY2035.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"714\" \/>\n\t<meta property=\"og:image:height\" content=\"491\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blogs\\\/16525\\\/\",\"url\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blogs\\\/16525\\\/\",\"name\":\"Curtailment Reduction Measures for Renewable Energy in Japan | RTS Corporation\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blogs\\\/16525\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blogs\\\/16525\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/wp-content\\\/uploads\\\/sites\\\/3\\\/2026\\\/09\\\/Curtailment-rate-for-FY2035.jpg\",\"datePublished\":\"2026-10-01T00:00:27+00:00\",\"description\":\"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in RTS Corporation is a leading PV industry \\\/ market consultingcompany and has been supporting the growth of the PV industry for nearly 40 years.We provide an optimal consulting service for each client interested in the PV business.\u3000Weekly PV news is available at RTS PV Blog.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blogs\\\/16525\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blogs\\\/16525\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blogs\\\/16525\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/wp-content\\\/uploads\\\/sites\\\/3\\\/2026\\\/09\\\/Curtailment-rate-for-FY2035.jpg\",\"contentUrl\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/wp-content\\\/uploads\\\/sites\\\/3\\\/2026\\\/09\\\/Curtailment-rate-for-FY2035.jpg\",\"width\":714,\"height\":491,\"caption\":\"Curtailment rate for FY2035\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blogs\\\/16525\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"HOME\",\"item\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PV Blog\",\"item\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Curtailment Reduction Measures for Renewable Energy in Japan\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/\",\"name\":\"RTS Corporation\",\"description\":\"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/#organization\",\"name\":\"RTS Corporation\",\"url\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/wp-content\\\/uploads\\\/sites\\\/3\\\/2020\\\/02\\\/logo-1.png\",\"contentUrl\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/wp-content\\\/uploads\\\/sites\\\/3\\\/2020\\\/02\\\/logo-1.png\",\"width\":610,\"height\":88,\"caption\":\"RTS Corporation\"},\"image\":{\"@id\":\"https:\\\/\\\/www.rts-pv.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/rts-corporation\\\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Curtailment Reduction Measures for Renewable Energy in Japan | RTS Corporation","description":"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in RTS Corporation is a leading PV industry \/ market consultingcompany and has been supporting the growth of the PV industry for nearly 40 years.We provide an optimal consulting service for each client interested in the PV business.\u3000Weekly PV news is available at RTS PV Blog.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/","og_locale":"en_US","og_type":"article","og_title":"Curtailment Reduction Measures for Renewable Energy in Japan | RTS Corporation","og_description":"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in RTS Corporation is a leading PV industry \/ market consultingcompany and has been supporting the growth of the PV industry for nearly 40 years.We provide an optimal consulting service for each client interested in the PV business.\u3000Weekly PV news is available at RTS PV Blog.","og_url":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/","og_site_name":"RTS Corporation","og_image":[{"width":714,"height":491,"url":"https:\/\/www.rts-pv.com\/en\/wp-content\/uploads\/sites\/3\/2026\/09\/Curtailment-rate-for-FY2035.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/","url":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/","name":"Curtailment Reduction Measures for Renewable Energy in Japan | RTS Corporation","isPartOf":{"@id":"https:\/\/www.rts-pv.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/#primaryimage"},"image":{"@id":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/#primaryimage"},"thumbnailUrl":"https:\/\/www.rts-pv.com\/en\/wp-content\/uploads\/sites\/3\/2026\/09\/Curtailment-rate-for-FY2035.jpg","datePublished":"2026-10-01T00:00:27+00:00","description":"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in RTS Corporation is a leading PV industry \/ market consultingcompany and has been supporting the growth of the PV industry for nearly 40 years.We provide an optimal consulting service for each client interested in the PV business.\u3000Weekly PV news is available at RTS PV Blog.","breadcrumb":{"@id":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.rts-pv.com\/en\/blogs\/16525\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/#primaryimage","url":"https:\/\/www.rts-pv.com\/en\/wp-content\/uploads\/sites\/3\/2026\/09\/Curtailment-rate-for-FY2035.jpg","contentUrl":"https:\/\/www.rts-pv.com\/en\/wp-content\/uploads\/sites\/3\/2026\/09\/Curtailment-rate-for-FY2035.jpg","width":714,"height":491,"caption":"Curtailment rate for FY2035"},{"@type":"BreadcrumbList","@id":"https:\/\/www.rts-pv.com\/en\/blogs\/16525\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"HOME","item":"https:\/\/www.rts-pv.com\/en\/"},{"@type":"ListItem","position":2,"name":"PV Blog","item":"https:\/\/www.rts-pv.com\/en\/blog\/"},{"@type":"ListItem","position":3,"name":"Curtailment Reduction Measures for Renewable Energy in Japan"}]},{"@type":"WebSite","@id":"https:\/\/www.rts-pv.com\/en\/#website","url":"https:\/\/www.rts-pv.com\/en\/","name":"RTS Corporation","description":"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in","publisher":{"@id":"https:\/\/www.rts-pv.com\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.rts-pv.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.rts-pv.com\/en\/#organization","name":"RTS Corporation","url":"https:\/\/www.rts-pv.com\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.rts-pv.com\/en\/#\/schema\/logo\/image\/","url":"https:\/\/www.rts-pv.com\/en\/wp-content\/uploads\/sites\/3\/2020\/02\/logo-1.png","contentUrl":"https:\/\/www.rts-pv.com\/en\/wp-content\/uploads\/sites\/3\/2020\/02\/logo-1.png","width":610,"height":88,"caption":"RTS Corporation"},"image":{"@id":"https:\/\/www.rts-pv.com\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/rts-corporation\/"]}]}},"_links":{"self":[{"href":"https:\/\/www.rts-pv.com\/en\/wp-json\/wp\/v2\/blogs\/16525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rts-pv.com\/en\/wp-json\/wp\/v2\/blogs"}],"about":[{"href":"https:\/\/www.rts-pv.com\/en\/wp-json\/wp\/v2\/types\/blogs"}],"version-history":[{"count":23,"href":"https:\/\/www.rts-pv.com\/en\/wp-json\/wp\/v2\/blogs\/16525\/revisions"}],"predecessor-version":[{"id":16592,"href":"https:\/\/www.rts-pv.com\/en\/wp-json\/wp\/v2\/blogs\/16525\/revisions\/16592"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rts-pv.com\/en\/wp-json\/wp\/v2\/media\/16584"}],"wp:attachment":[{"href":"https:\/\/www.rts-pv.com\/en\/wp-json\/wp\/v2\/media?parent=16525"}],"wp:term":[{"taxonomy":"blogs_category","embeddable":true,"href":"https:\/\/www.rts-pv.com\/en\/wp-json\/wp\/v2\/blogs_category?post=16525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}