Kei Takase and Chisato Fukushima each won a second sprint title on Sunday, the final day of the national athletics championships.
Takase captured his first men's 100-meter crown in 10.28 seconds after winning the 200 the day before at Niigata's Denka Big Swan Stadium, while Fukushima ran 11.50 to win her sixth straight women's 100 championship. It was the fifth straight year in which she has won both the 100 and 200.
Both Takase and Fukushima earned the right to compete in both events at the world athletics championships to be held in Beijing in August.
Ryohei Arai can also pack his bags for Beijing after throwing the men's javelin with a meet record 84.13 meters. Joining him on the team for worlds will be Yuzo Kanemaru, who won his 11th 400-meter title, men's 5,000-meter champ Kota Murayama, men's long jump winner Yohei Sugai and women's 5,000-meter champ Misaki Onishi.
Meanwhile, 32-year-old Satoshi Hatase set a Japan shot put record of 18.78 meters to win his fourth straight national championship.