Japan's Emperor Emeritus Akihito has been hospitalized in Tokyo for adjustment of medicine to treat his heart disease.

Shares are mixed in Asia after the S&P 500 and the Nasdaq composite edged away from the records they set last week.

Dosage for the new treatment will be decided after the 91-year-old former emperor undergoes an electrocardiogram.

At 28, he boasts a glittering resume that includes an Olympic marathon swimming gold from the 2024 Paris Games – his ...