This is reported by NHK.
It is noted that the operation is scheduled for September 8. It is expected to last four hours.
In late August, King of Spain Juan Carlos was discharged from the hospital after heart surgery.
Empress of Japan to undergo breast cancer surgery
2019-09-07T05:56:03.585Z
Honorary Empress of Japan Michiko, the mother of the current Emperor Naruhito, was hospitalized before surgery to remove a breast tumor.
Source: russiart