Japan Swim 2026: Matsushita's PB and Kojima's WJR in the 400m IM (2026)

The 101st Japan Swim competition witnessed a thrilling showdown in the men's 400m Individual Medley (IM) event, with Tomoyuki Matsushita and Yumeki Kojima emerging as the stars of the show. Matsushita, a 20-year-old reigning Olympic silver medalist, shattered his own lifetime best with a stunning 4:06.93, solidifying his position as a world-class contender in this event. This achievement marks his first-ever foray under the 4:07 barrier, making him the 9th-fastest performer in history and usurping American Olympic medalist Carson Foster to rank #1 in the world this season.

What makes Matsushita's performance even more remarkable is the context. He had previously held a lifetime best of 4:07.21, achieved at the Japan Student Swimming Championships in September. The 4:06.93 time he clocked in at the 101st Japan Swim is a significant improvement, showcasing his dedication and hard work in training. The competition was fierce, with Matsushita finishing just ahead of his 17-year-old counterpart, Kojima, who also set a new World Junior Record (WJR) of 4:08.84.

Kojima's performance was equally impressive, as he crushed his previous best-ever and WJR of 4:09.38, which he had set as a 16-year-old last July. The 17-year-old's split times were remarkably close to Matsushita's, with only a slight difference of about two seconds. Kojima's achievement places him as Japan's 5th-fastest men's 400m IM performer in history, all at the tender age of 17. These results are a testament to the rising talent in Japanese swimming, with both swimmers showcasing exceptional skill and potential.

The 101st Japan Swim has been a platform for breaking records and achieving personal bests, with multiple World Junior Records and Japanese national records already set through the first three days of the meet. The competition's intensity and the swimmers' remarkable performances have undoubtedly raised the bar for the Pan Pacific Championships and Asian Games qualification. As the meet concludes, the swimming world eagerly anticipates the continued rise of Japanese talent and the potential for further record-breaking achievements.

Japan Swim 2026: Matsushita's PB and Kojima's WJR in the 400m IM (2026)
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