Yes, I've got one in each of my Arai's. My previous Condor and my new GP5X.
Works like a charm in my experience.
Pretty quick to tint and recover as I found out in Spain a couple of weeks back travelling in and out of tunnels on twisty mountain passes.
The GP5X has a very fiddly (4 screws) visor changing system, unlike all the other full-face Arai's, so it had to be the Hyper-Optik or nothing really and so I went with the Universal one. I can't see why it wouldn't fir an HJC, unless the visor has a second curve.
Highly recommended - just take you time when fitting it, like any FogCity.
"Whose wine, what wine, where the hell did I dine?"