Click here for complete results from Day Four. A summary of Japanese results:
- Japan's best chance for a gold medal in the Championships, sprinter Shota Iizuka, easily won his heat and semi-final in the men's 200 m. Click here for a photo of Iizuka in action. Jun Kimura made it through the heats but could not join Iizuka in the final.
- Kana Ichikawa advanced through the heats and semi-final in the women's 200 m to make the final rouond. Teammate Narumi Tashiro was eliminated in the heats.
- Takatoshi Abe won the second semi-final heat of the men's 400 m hurdles in 50.45. As in the heats his time was a season best and the fastest in the field.
- Shiori Miki won the third semi-final heat of the women's 400 m hurdles in 58.45, the second-fastest overall among the three heats.
- Genki Dean advanced through the men's javelin qualification round in 3rd, well ahead of his pre-competition ranking of 6th. Kenji Maritani failed to make the cut.
- Tokyo-based Team Nissin Shokuhin Kenyan Caleb Ndiku added his second world junior title of the year to his resume with a 3:37.30 PB win in the men's 1500 m.