{"id":639647,"date":"2026-03-22T06:57:05","date_gmt":"2026-03-22T13:57:05","guid":{"rendered":"https:\/\/www.swimmingworldmagazine.com\/news\/?p=639647"},"modified":"2026-03-22T06:57:05","modified_gmt":"2026-03-22T13:57:05","slug":"tomoyuki-matsushita-dazzles-in-400-im-at-japan-swim-yumeki-kojima-cracks-another-wjr","status":"publish","type":"post","link":"https:\/\/www.swimmingworldmagazine.com\/news\/tomoyuki-matsushita-dazzles-in-400-im-at-japan-swim-yumeki-kojima-cracks-another-wjr\/","title":{"rendered":"Tomoyuki Matsushita Dazzles in 400 IM at Japan Swim; Yumeki Kojima Cracks Another WJR"},"content":{"rendered":"<p><strong>Tomoyuki Matsushita Dazzles in 400 IM at Japan Swim; Yumeki Kojima Cracks Another WJR<\/strong><\/p>\n<p>The days of the Japanese excellence in the 400-meter individual medley are alive and well, as the final day of the Japan Swim demonstrated. In the final event of the men&#8217;s program, three athletes clocked under 4:09, led by <strong>Tomoyuki Matsushita<\/strong> in a sensational mark of 4:06.93. Matsushita was followed by <strong>Yumeki Kojima<\/strong> (4:08.84) and <strong>Asaki Nishikawa<\/strong> (4:08.87), with Kojima&#8217;s time good for his second world junior record of the meet.<\/p>\n<p>The recent tradition established by <strong>Kosuke Hagino<\/strong> and <strong>Daiya Seto<\/strong> in the 400 IM is certainly being upheld by this current contingent of stars in the event. Matsushita, the reigning Olympic silver medalist, made his inaugural trip under 4:07 and bettered his previous lifetime best of 4:07.21. The difference for Matsushita was a spectacular freestyle split of 55.96, which enabled him to pull away over the last 100 meters.<\/p>\n<p>The battle for second place went down to the final stroke, and it was Kojima who grabbed second place with a world junior record. Coming off a WJR in the 200 IM, Kojima improved his prior standard of 4:09.38, set last year in high school competition. By edging Nishikawa, Kojima earned the right to represent Japan in the 400 IM at the Pan Pacific Championships and Asian Games.<\/p>\n<p>Producing a time of 8:23.11, <strong>Ichika Kajimoto<\/strong> erased a 21-year-old national record in the 800 freestyle. Kajimoto recorded a seven-second victory and bettered the 8:23.68 of <strong>Sachiko Yamada<\/strong> from the 2004 season. On Day Two of the meet, Kajimoto went under the 16-minute barrier in the 1500 freestyle to easily prevail. That national record wasn&#8217;t the only one of the session, as <strong>Kaito Tabuchi<\/strong> went 14:45.57 to clobber the former standard of 14:50.18, set by <strong>Kazushi Imafuku<\/strong> last year. Imafuku was second on Sunday night, going 14:52.45.<\/p>\n<p><strong>Satomi Suzuki<\/strong>, the 35-year-old veteran, added the 50 breaststroke crown to her prior win in the 100 breaststroke. In the one-lap sprint, Suzuki went 30.32 to win by .77. In the women&#8217;s 50 freestyle. <strong>Rikako Ikee<\/strong> won in 24.89, the only effort under 25 seconds.<\/p>\n<p>In other action, <strong>Shuya Matsumoto<\/strong> won the men&#8217;s 50 freestyle in 21.89 while <strong>Shoon Mitsunaga<\/strong> edged <strong>Katsuhiro<\/strong> <strong>Matsumoto<\/strong> in the 100 butterfly, 51.32 to 51.35. There was a tie in the men&#8217;s 50 backstroke as <strong>Reo Miura<\/strong> and <strong>Riku<\/strong> <strong>Matsuyama<\/strong> each touched in 25.13.<\/p>\n<p><a href=\"https:\/\/swim.seiko.co.jp\/en\/2025\/S70701\/eng_index.htm\" target=\"_blank\" rel=\"noopener\">Meet Results<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tomoyuki Matsushita Dazzles in 400 IM at Japan Swim; Yumeki Kojima Cracks Another WJR The days of the Japanese excellence in the 400-meter individual medley are alive and well, as<\/p>\n","protected":false},"author":7533,"featured_media":624133,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"dois","enabled":false},"version":2}},"categories":[3,10],"tags":[68121,131994,136726],"class_list":["post-639647","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-featured","category-world","tag-japan-swim","tag-tomoyuki-matsushita","tag-yumeki-kojima"],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.3 (Yoast SEO v24.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>Tomoyuki Matsushita Dazzles in 400 IM at Japan Swim<\/title>\r\n<meta name=\"description\" content=\"While Tomoyuki Matsushita surged to a win in the 400 individual medley at the Japan Swim, Yumeki Kojima broke another world junior record.\" \/>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.swimmingworldmagazine.com\/news\/tomoyuki-matsushita-dazzles-in-400-im-at-japan-swim-yumeki-kojima-cracks-another-wjr\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Tomoyuki Matsushita Dazzles in 400 IM at Japan Swim; 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