Tokyo Gov. Yuriko Koike was discharged from a hospital following treatment for severe fatigue, the metropolitan government said Wednesday, less than a month before the opening of the Olympics.

Koike, 68, was admitted to a hospital on June 22.

Koike will work remotely for the time being following doctors' advice, she said in a statement.

"I deeply apologize for causing worries and troubles to many people by not being able to work at this important time immediately before the 2020 Tokyo Olympics and Paralympics and when we are working on measures to tackle COVID-19," the statement said.

The governor also apologized to metropolitan assembly members for making them worry during the campaigning period for the assembly election slated for Sunday.

Koike had been occupied with work related to the coronavirus pandemic and hosting the Tokyo Games. The summer games will start from July 23 as Japan continues to struggle to contain the virus spread.

Before her hospitalization, she attended an online meeting of representatives of the five organizing bodies including the International Olympic Committee to set domestic spectator caps. She also subsequently participated in a meeting related to COVID-19 vaccines.

While official campaigning is under way for the metropolitan assembly election, it remains uncertain whether Koike can come out to support Tomin First no Kai (Tokyoites First), the regional party she founded and for which she currently serves as special adviser.

Deputy Tokyo Gov. Mitsuchika Tarao took over Koike's duties during her absence.