A male resident of Tokyo in his 40s who spent much of the past year in Liberia has tested negative for Ebola after being hospitalized in the capital, the health ministry said Monday.

The man, a foreign national, is not a health worker and says he did not have contact with Ebola patients in the West African country, according to the ministry. He stayed in Liberia from around last summer until March 2, arriving in Japan two days later.

He was admitted to a Tokyo hospital when he developed a fever above 38 degrees on Sunday night and received tests for infectious diseases. Influenza proved negative, but malaria tested positive.

He was the sixth person in Japan to be suspected of carrying Ebola. All have tested negative.