1) Patients who have given written consent to participate in the study2) age > 20 years old3) SARS-CoV-2 PCR or LAMP test positive or COVID-19 confirmed by the diagnostic test which is approved by the Ministry of Health, Labor and Welfare4) Patients with COVID-19 pneumonia on chest CT scan5) Patients who can admit on the hospital at least 10 days during treatment6) Patients who can use ciclesonide inhaler 7) Pregnancy test-negative

1) Patients who have given written consent to participate in the study2) age > 20 years old3) SARS-CoV-2 PCR or LAMP test positive or COVID-19 confirmed by the diagnostic test which is approved by the Ministry of Health, Labor and Welfare4) Patients with COVID-19 pneumonia on chest CT scan5) Patients who can admit on the hospital at least 10 days during treatment6) Patients who can use ciclesonide inhaler 7) Pregnancy test-negative

1) Patients who have given written consent to participate in the study2) age > 20 years old3) SARS-CoV-2 PCR or LAMP test positive4) Patients with COVID-19 pneumonia on chest CT scan5) Patients who can admit on the hospital at least 10 days during treatment6) Patients who can use ciclesonide inhaler 7) Pregnancy test-negative

1) Patients who have given written consent to participate in the study2) age > 20 years old3) SARS-CoV-2 PCR or LAMP test positive4) Patients with COVID-19 pneumonia on chest CT scan5) Patients who can admit on the hospital at least 10 days during treatment6) Patients who can use ciclesonide inhaler 7) Pregnancy test-negative