You can watch it for free on the NHK World home page: [You must be registered and logged in to see this link.]
It's a bit of a late notification, but there are 3 airings left at 3:30, 7:30, and 11:30 UTC (Monday 3/17). It's just a brief cameo, really, but if you like to watch anything and everything with SCANDAL, here's one more thing to add to your list.
I'd say it's worth watching the episode just for Zeebra alone. He's a popular Japanese rapper and was pretty awesome on the show.