In Japan, infection spread of new coronavirus continues for the moment. It means that the problem is whether families can gather at year-end and New Year.
Even if it is possible in Japan, the risk is big in the family having old persons.
Infection spread also continues in the European countries, and WHO urges not to gather in families. In other words, it is warning to be critical that families gather on Christmas.
There is not the legal regulation in Japan, but there may be legal regulation in the European countries.