Giniko USA TV - Events is available at Roku app store. Visit at your Roku device Search section and enter "Giniko USA" to install. Then enter your credential to watch.
Alternatively you can also install directly clicking to https://my.roku.com/add/ginikousatv. You will be asked to login to your Roku account. Once signed in, click on the "Yes, Add Channel" button on the pop-up window.