Impressive. You really have mad Google Skillz Stiletto (and it's obvious that mine are too ordinary to even compare - I've had that pic for close to 10 years and never even found out where it came from 😅 ). I humbly bow down to show my gratitude and respect.
Well... I do. 😀
But in this case it's pretty easy. I'll break it down:
1. (and this is key) Google Image Search these days can take a image as input - aka "reverse image search". Open https://images.google.com in a new tab/window. Go to the page/site where your image resides. Left-click and drag the image towards the Google Image tab. Hover the cursor over the tab/window so that it re-opens. Finally, let go of the left mouse button when the mouse cursor is over the Google Image entry. It will show that it accepted your image as something to search for, then redirect to a page of results. This results page is pretty interesting. It can give you a list of every site linking to any size version of your image, list just the main sites, gives you a suspected search query, display similar images, all sorts of things.
There are other ways to do this, even other sites (http://www.tineye.com was the first I knew of, but of course Google leverages all their tricks.)
2. Gave me a small list of results, so I cherry-picked the ones likely to yield additional info. One was a British computer forum. They talked about the image, displayed others from the builder, and linked to his Japanese website. 😀
"I see a little silhouette-o of a man, Scaramouche, Scaramouche, will you
do the Fandango!" - Queen