Platforms to watch Olympics Online from PC/Mobile/Tablet
NHK Sports Channel
Below is very useful. You can filter based on each game for the day and click on the live stream link
The first one is Gorin.jp https://gorin.jp/live/, Japan’s official online broadcaster for the Tokyo Olympics, which will begin streaming events from July 21, starting with the qualifying tournaments for women’s football with Japanese commentary. Aside from showing the competitions live, the site also has videos of victorious moments from previous Olympic events when Japanese athletes broke records or won a medal.