Thanks for looking closely at the design, @Hatsune Mike, but actually there are various versions each with different typeface that have been produced by Taito over the years. I have studied my and others' photos of them extensively. The version that I have matched is the most common version found in Hey today and I have certainly not used a standard font to match it. The photo from Arcade Tokyo shown above includes a much earlier version that is only found on one of Hey's Egret 2 cabs today--it may actually have been replaced in the last year or two (I'm not certain). I may also try to match that particular font design at some point, but I've thus far focused on the most common design and typeface used by Hey today.The HEY! strip is looking pretty good, but the typeface is very different. The original has a few stylistic quirks to it that are lost when using another off the shelf font.
I can assure you that I have no interest in providing my own take on the designs. I have done a lot of work to recreate them as closely as possible. I'll post additional photos of the originals when I finally finish up the designs to my satisfaction.