A timely topic of the year, 2020, COVID-19 has had inevitable effects on the world in various ways. Consequently, it has initiated fundamental changes to the global economy. A highly infectious disease and much of it remains a mystery - the reason why containing the spread of the disease has been extremely challenging. As part of prevention methodologies, lockdowns and quarantine measures have been enforced by governments, which has caused domestic economic activity to decrease. Furthermore, in terms of economic activity within and outside individual countries, limiting the movement of people and decreasing the interactions among individuals have caused great damage to numerous industries of the service sector; for instance, tourism, aviation, and hotels, to name a few. The spotlight is shone on Japan and the changes COVID-19 has brought to the country’s economy will be discussed. This paper aims to examine and analyze the tertiary sector of industries as it has been affected the most in comparison to the primary or secondary sectors. Within the tertiary sector or namely, the service sector, varying degrees of economic impacts can be observed. It was found that the ICT industry had the best sales compared to the hospitality and transportation industries as expected. However, within this industry, the broadcasting industry had declining monthly sales while the internet-based services had relatively better monthly sales. Next, for the food services and accommodation industries, both sectors have experienced declining sales. Then, it was found that the railroad and airline industries are facing innumerable job losses. Overall, it can be concluded that all of the industries within the tertiary sector have suffered detrimentally due to the restriction on the movement of people domestically and internationally. The “new normal” initiated by this global phenomenon has undeniably caused living standards to drastically change and the full effects of the pandemic is still yet to be investigated in coming years.