咱们平时说的“宅男、宅女”可能充其量就是周末假日不爱出门的人，但是在日本，有那么一群年轻人，他们因为某种原因把自己关在家里，可以几个月甚至几年都不出门。这样的群体叫做“蛰居族”。 As many as a million young people in Japan are thought to remain holed up in their homes - sometimes for decades at a time. They had become "withdrawn" or hiki...