Even though I haven't gone to a live myself, I am 99.9% sure he does.

First of all, his "persona" as people may call it doesn't have any signature mask or anything that covers his face like Ito Kashitaro or Underbar (__) have so it would be unusual for him to have a mask since other than to hear him sing in person or just to support, people usually go to lives to see what the Utaite's face looks like (or see it in person for people who already have revealed their faces). Also many Utaite don't show their face or at least their whole face very often because of many reasons like insecurity or not wanting people in their life to know about their activities. They all have their reasons which we'll never know because we aren't them, and frankly they don't have to because they are Utaite not "professional singers" (notice the quotes) not signed with a company (although some have) and most of them aren't doing it for a profit (believe it or not most of them have separate jobs or are in school). In a television program a few months ago Amatsuki said the pros about being an Utaite and not a "professional singer" is that they don't need to show they're faces, and people like them solely because of their music (This isn't word for word by the way, I paraphrased it and roughly translated it since I don't remember every detail sorry...)

Secondly, if you keep up with his activities on twitter, you'll notice that after lives there are often live reports by companies such as Natalie.mu or Spice which have received permission to take photos of them during the live (usually in the title of the report it will say whether there are photos or not). In those photos taken from Eve and Sou's two-man and in his own Otogi tour (I might be wrong about the last one, it may have not been a tour) The photos had some kind of light that covered up their face, but that is just in the photo (kind of like special effects and angle since the photos are taken by professionals) and if you were in the audience the light would probably not block their face the entire time since they would be moving around the stage (and to have a really bright light enough to hide your face at your face for around 2 hours is physically straining).

So in short, yes I'm pretty sure he does based on the fact his character (of himself, not his MV characters) does not have a mask and after-live photos don't show any signs of him hiding his face.

If you want to see the photos you should check out his twitter (either he tweeted the link to the report himself or you'll have to look through his retweets) but please DON'T reupload them on other sites and such because he's probably not fond of having his picture all over the internet as you said he doesn't show his face often (meaning he probably doesn't like it!)

Sorry if it was kind of long but I hope it helps!