The Zairyu Card is a residence card issued to foreign nationals living in Japan. It serves as proof of their legal status and residency in the country. The card contains important information, including the holder's name, address, visa status, and period of stay. Foreign residents must carry their Zairyu Card at all times and present it when required by authorities. The card is typically issued for the duration of the individual's visa and must be renewed if the visa is extended. It plays a crucial role in facilitating various administrative processes in Japan.