Public transit has also been paralyzed across the island prefecture.
Aviation authorities canceled all flights at New Chitose Airport on Thursday. The country's transport ministry says a partial ceiling collapse and burst water pipes have shut down the airport's terminal. Workers are also checking runways for damage.
Police in Okinawa Prefecture, southern Japan, are working with the US military to investigate damage possibly caused by a stray bullet from American forces.
Officials visited a farm in Nago City on Friday after the owner told police the previous day that he found what appears to be a bullet mark on a shed.
Japan's transport ministry has instructed a railway operator to look into an apparent failure to follow procedures after a fatal accident partially halted services on a bullet train line for several hours.
At around 2 PM on Thursday, a major dent was detected on the nose cone of a "Nozomi 176" bullet train. A body part was later found on the tracks of the Sanyo Shinkansen line in Fukuoka Prefecture. The Tokyo-bound train had begun its journey in Hakata, western Japan.