{"id":15554,"date":"2026-10-30T14:28:35","date_gmt":"2026-10-30T05:28:35","guid":{"rendered":"https:\/\/www.iir.hit-u.ac.jp\/en\/?page_id=15554"},"modified":"2026-10-30T14:28:48","modified_gmt":"2026-10-30T05:28:48","slug":"rl-wp","status":"publish","type":"page","link":"https:\/\/www.iir.hit-u.ac.jp\/en\/rl-wp\/","title":{"rendered":"Working Paper"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"15554\" class=\"elementor elementor-15554\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c48a62d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c48a62d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e55718e\" data-id=\"e55718e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-13cc4c3 elementor-widget elementor-widget-text-editor\" data-id=\"13cc4c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/www.iir.hit-u.ac.jp\/en\/rl-article\/\"><span style=\"color: #3366ff;\"><strong>Article<\/strong><\/span><\/a> | <a href=\"https:\/\/www.iir.hit-u.ac.jp\/en\/rl-wp\/\"><strong><span style=\"color: #3366ff;\">Working Paper<\/span><\/strong><\/a> | <a href=\"https:\/\/www.iir.hit-u.ac.jp\/en\/rl-cs\/\"><strong><span style=\"color: #3366ff;\">Case Study<\/span><\/strong><\/a> | <a href=\"https:\/\/www.iir.hit-u.ac.jp\/en\/rl-others\/\"><strong><span style=\"color: #3366ff;\">Others<\/span><\/strong><\/a><br \/>\u00a0\u25b6 Data from before March 2025 will be available here (coming soon).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-137b0c3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"137b0c3\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e162a94\" data-id=\"e162a94\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-28adbfb elementor-widget elementor-widget-shortcode\" data-id=\"28adbfb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">      <div id=\"post-grid-lazy-15536\" class=\"post-grid-lazy\"><img decoding=\"async\" alt=\"\" src=\"\" \/><\/div>\n    <script>\n      jQuery('#post-grid-lazy-15536').ready(function($) {\n        $('#post-grid-lazy-15536').fadeOut();\n        $('#post-grid-15536   ').fadeIn();\n      })\n    <\/script>\n    <style type=\"text\/css\">\n      #post-grid-15536 {\n        display: none;\n      }\n\n      .post-grid-lazy {\n        text-align: center;\n      }\n    <\/style>\n    <div data-options='{&quot;id&quot;:&quot;15536&quot;,&quot;lazy_load&quot;:&quot;yes&quot;,&quot;masonry_enable&quot;:&quot;no&quot;,&quot;view_type&quot;:&quot;grid&quot;}' id=\"post-grid-15536\" class=\"post-grid grid\">\n    \n\n\n    <div class=\"grid-items\">\n      <div class=\"item item-15380 skin flat even 0 \">\n        <div class=\"layer-wrapper layout-15544\">\n          <div class=\"element element_5  title_link \">\r\n                    <a target=\"_blank\"\r\n                href=\"https:\/\/www.iir.hit-u.ac.jp\/en\/2025\/09\/01\/results-20261007-3\/\">\u3010Kentaro Nakajima\u3011The Impact of Military Technology Development on Innovation: Evidence from Prewar and Wartime Japanese Secret Patents<\/a>\r\n            <\/div>\r\n    <div class=\"element element_8  excerpt \">\r\n        \u25b6Category\uff1a Working Paper(outside IIR) \u25b6Author\uff1aKotani, Atsuki\uff1aKentaro Nakajima\uff1aTetsuji Okazaki\uff1aYukiko U. Saito \u25b6Institution\uff1aRIETI Discussion Paper Series \u25b6Number\uff1a25-E-093 \u25b6Release Date\uff1a2025\/09\/01 \u25b6Article Title\uff1aThe Impact of Military Technology Development on Innovation: Evidence from Prewar and Wartime Japanese Secret Patents \u25b6Abstract\uff1aInnovations in military technology potentially drive significant societal transformations through applications to civilian use. This study aims to quantitatively measure the impact of military technology development on civilian innovation activities using prewar and wartime Japanese patent data from 1916 to 1945. By exploiting Japan's secret patent system, which classified particularly critical military-related technologies not disclosed to the public, we identify important technological developments. 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