Day 4 of the 2026 National High School Championships saw this year's first meet record. In a breakaway race Bilith Boi (Sapporo Yamanote H.S.) dropped the rest of the lead quartet to take the boys' 5000 m in a 13:34.53 MR, outrunning crosstown rival Sei Yoshida (Tokaidai Sapporo H.S.) whose 13:36.34 was the fastest-ever by a Japanese-born runner at Nationals. 3rd-placer Kogo Yonenaga (Kagoshima Kogyo H.S.) just made it under 13:40 too in 13:39.86, with Kemboi Kiprop (Kurashiki H.S.) dropping off for 4th in 13:42.76. In a season that's already seen a girls' heptathlon high school NR from Sawa Okada , Mirei Eguchi (Tokaidai Sagami H.S.) stayed solid throughout the second day of the heptathlon to win in a 5447 PB. That was enough to move her up to all-time #3 on the Japanese high school lists behind Okada's 5559 from May and previous record holder Meg Hemphill 's 5519. The girls' 400 mH final had great times up front too. Yuna Kusuda (Kagoshima Joshi H.S...
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