The benchmark Nikkei 225 index gained 1.25 percent, or 373.65 points, to end at 30,381.84, while the broader Topix index rose 1.29 percent, or 26.72 points, to 2,091.65
The benchmark Nikkei 225 index slid 0.98 percent, or 267.92 points, to end at 27,013.25, while the broader Topix index lost 0.87 percent, or 16.51 points, to 1,880.68
The number of virus cases continues to soar in Japan and Prime Minister Yoshihide Suga urged people to avoid gatherings, saying "the virus has no holidays".