Day 4 of the Tokyo World Athletics Championships had a relatively small number of Japanese athletes in action, but it was highlighted by another great run in the men's 400 m from new NR holder Yuki Joseph Nakajima . 800 m NR holder Ko Ochiai , who made Worlds on a host country slot, bowed out in the first round with a 1:46.78 for 7th in Heat 5, putting him at 45th of 63 finishers overall. Neither member of the women's triple jump squad advanced either, Maoko Takashima 13th in qualification group A at 13.86 m (-0.3) and Mariko Morimoto 17th in group B and last overall at 13.10 m (+0.5). Ryoichi Akamatsu added to Japan's top 8 placing count, taking 8th in the men's high jump final at 2.24 m. Yuto Seko was 10th, clearing only 2.20 m after having hit the 2.33 m qualifying standard in late August. Olympic champ Hamish Kerr of New Zealand won a great duel against Korean Sanghyeok Woo , 2.36 m to 2.34 m. Czech Jan Stefela won bronze at 2.31 m. In the men's 110 m hur...
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