Prime Minister Kishida Fumio says Japan must set up a system that clearly shows its counterstrikes are not pre-emptive attacks, when the country faces missile attacks.

Kishida said at an Upper House budget committee meeting on Wednesday that Japan must be fully-equipped to protect people's lives and livelihoods amid rapidly evolving missile and other technologies.

Japan's Agriculture, Forestry and Fisheries Ministry has laid out anti-infection rules for restaurants that hope to join the "Go To Eat" campaign.

The rules include placing disinfectant at entrances and ensuring that there is sufficient ventilation. Tables must also be placed more than a meter apart or separated by partitions.