Yes, there are special measures announced on June 1, 2020 by the Immigration Services Agency for foreign nationals holding working visa statuses who have had their employment affected by the COVID-19 global pandemic situation. As of December 2020, these measures are still active. There are four categories of people who would be eligible for these special measures:
Those who have been notified of the termination of their employment, or the non-renewal of their employment contract and wish to look for work.
Those who have been ordered to standby and wish to return to work.
Those who have had their work days or hours reduced, and wish to continue working.
Those in a situation equivalent to the above.
People who fall into one of the categories listed above will be permitted to remain in Japan using their current visa status. If there is less than 1 month standby remaining, or the foreign national is working reduced hours, in the case that the majority of their total work at the company was with normal work hours, they would be able to apply for a 1 year extension of the current status. They will also be allowed, with permission from their current employer, to apply for a Permission to Engage in Activity Other than that Permitted under the Status of Residence Previously Granted (part-time work permit) in order to supplement their loss of income. The duration of the permit will be 6 months or the expiration date of the visa status, whichever comes sooner.
In addition, those whose status is expiring soon would be eligible to apply for a Designated Activities – Job hunting visa status as well as a part-time work permit valid for 6 months.
When making the applications above, it will be necessary to submit documents from the employer/former employer to provide proof of the circumstances.
検査は出国前（搭乗予定航空便の出発時刻）72時間以内に受検し、検査証明を取得する必要があります。検査証明は、任意フォーマットの提出でも可ですが、日本の空港での検疫及び入国審査に時間がかかる可能性がある。また、下記情報は必須です。任意のフォーマットを使用する際は全項目を英語で記載する必要があります。
・人定事項（氏名、パスポート番号、国籍、生年月日、性別）
・COVID-19の検査証明内容（検査手法（指定フォーマットに記載されている採取検体及び検査法に限る）検査結果、検体採取日時、検査結果決定年月日、検査証明交付年月日）
・医療機関等の情報（医療機関名（又は医師名）、医療機関住所、医療機関印影（又は医師署名））
原則は指定フォーマットを使用し、医療機関が指定フォーマットに対応していない場合等に、例外的に任意のフォーマットを使用することをお勧めします。