If Japan does not pay the patent fee, how can it be sanctioned?

1. Take legal action: Other countries may take legal action to protect them from unpaid patent fees. This may include litigation, sanctions or other legal measures against countries that have not paid patent fees.

2. Reduce the patent authorization: If a country refuses to pay the patent fee, then Japan may reduce the patent authorization for that country, which means that the country's innovation and technological progress may be limited.