The fights will be on FujiTV which, if you use a well know streaming service, will be known as "フジテレビ" (which translates literally as Fuji Television and is pronounced Fuji Terebi). The channel is a free to air one in Japan though it's not a channel that is internationally streamed by the company themselves so you will likely need to find a way to stream the fight yourself.
The broadcast is to begin at 9:30PM (21:30) Tokyo time. If you're in the UK that means the fight broadcast will be at 1:30PM (13:30), if you're in New York it'll be 8.30AM and if you're in Los Angeles the fight will be at 5.30AM. For those in other places we advise you either contact us in the comments section stating where you're from or working out your time zone in relation to Tokyo, London, New York or California.
The broadcast is scheduled to last a little under 2 hours, ending at 11:22PM (23:22) Tokyo time and feature the bouts involving Ryota Murata (against Adrian Luna Flores), Naoya Inoue (Samartlek Kokietgym) and Akira Yaegashi (against Roman Gonzalez). From what we are aware these bouts will be shown on tape delay so be cautious if you're on twitter as the results may have been made public before the broadcast begins.
For those wanting to check they have the right channel in the hours preceding the fights, the channel will be showing a soccer, or Football, match between Japan and Uruguay prior to the boxing.
At the time of writing Fuji TV have got a trailer on their website which can be seen here. Unfortunately we can't find a way to embed the video here.
For those who have friends wanting to watch the fight we advise you share this information with them ahead of the fight to allow them to search for their method of getting FujiTV. If you're in Japan however you'll have no issues getting the channel.