Japanese Emperor Akihito fully resumed his official duties Thursday after recovering from dizziness and nausea that forced him to rest at the Imperial Palace earlier this week.

The 84-year-old emperor took part in a ceremony at the palace to receive letters of credence from newly-appointed foreign ambassadors.

"His health is almost fully recovered, and he is back to his normal life," said an official of the Imperial Household Agency.

(File photo)

On Monday, the emperor complained of dizziness and nausea, which the agency said were due to "cerebral anemia," or insufficient blood circulation in the brain.

The emperor is set to abdicate on April 30, 2019 -- the first Japanese monarch to do so in about 200 years -- based on his desire to step down due to concern about his age and failing health.

His latest symptoms forced him to skip a meeting on Monday with Princess Ayako, the youngest daughter of the emperor's late cousin Prince Takamado, on her upcoming engagement to a businessman.

On Tuesday, he had stomachache and felt dizzy, and postponed resuming his duties. The next day he started stamping documents approved at Cabinet meetings, in between his rests, according to the agency.