The spokesperson for the presidency, Albert Yaloke Mokpeme, made the announcement on Thursday on national radio.
People were still commuting on crowded trains and buses in Osaka, Fukuoka and other areas of the seven new prefectures placed under the state of emergency.
Prime Minister Yoshide Suga also said Japan will suspend fast-track business entry permits, fully banning foreign visitors while the state of emergency is in place.
Muhyiddin Yassin assured citizens in a televised speech that the emergency was "not a military coup and curfew will not be enforced."
The suit has been filed by children of 94-year-old Veera Sarin, who recently moved SC to declare as unconstitutional the national emergency imposed by the Congress government in 1975.
There was no immediate decision, but the government panel of medical experts will study the situation, Yoshimura said.
The month-long declaration is not nationwide. It affects four neighbouring areas that account for much of the rise in Japan's caseload: Tokyo, Chiba, Kanagawa and Saitama.
Public broadcaster NHK cited that the Dai-ichi Life Research Institute is predicting a loss of 75,000 jobs over six months after the potential declaration.
The decree enables the municipal government to temporarily contract personnel, services and material without public tenders.
Suga had been reluctant to declare another state of emergency as the economy would face a severe blow.
SII Pune has submitted safety immunogenicity and efficacy data generated on 23,745 participants, The overall vaccine efficacy was found to be 70.42 per cent.
Citing sources, NHK broadcaster reported that Tokyo plans to file a request jointly with Saitama Prefecture, north of Tokyo, which has also seen a rapid spread of the virus.
The three services were granted emergency powers to buy or lease any weapon system of their choice around the middle of 2020 after Chinese transgressions in the Ladakh sector.
The Indian High Commission in London said that it is on standby for any "emergency visa" requirements.
The Pune-based SII, the world's largest vaccine manufacturer, has made a collaboration with the University of Oxford and AstraZeneca.