Japanese short-track speed skaters Satoru Terao and Yuka Kamino won the 500 and 1,500 meters in the national championships and all but secured their places in the Turin Olympics in both events.
Terao edged Nagano Olympic 500-meter gold medalist Takafumi Nishitani to win the men's 1,500 in 2 minutes, 25.068 seconds before adding the 500-meter crown in 43.943 seconds to take the overall lead with 68 points.
Nishitani, who is second overall, finished second in the 1,500 in 2:25.222 and was disqualified in the 500 for interference.
Kamino won the 1,500 in a meet-record 2:25.832 and the 500 in 46.324 and came out on top of the women's standings with 68 points. Chikage Tanaka is second after a pair of runner-up finishes.
Japanese skating officials will select short-track athletes competing in the Turin Olympics in February based on the results of the ongoing national championships and the single-distance national championships held earlier this month.
Terao and Kamino both won a 500 and 1,500 double in the single-distance meet.