Prime Minister Shinzo Abe visited a hospital on Monday, raising concerns about whether he is still fit enough to lead the nation through a pandemic and an economic downturn.

Abe entered Keio University Hospital in the Shinanomachi district of Tokyo at about 10:30 a.m. His aide and a hospital official told reporters the visit was a followup on his regular medical check-up in June.

“The prime minister is visiting a hospital for a daylong checkup during the summer break as he has hardly had any days off recently and would like to be in his best condition after the break is over,” a source close to the prime minister said.