Isn't it basically just Wāpuro rōmaji, i.e. how you input Japanese using romaji with a keyboard.
My point is more that this isn't really anything new. It's a fairly common way to Romanize Japanese in practice, even though it doesn't strictly follow Hepburn or Nihon-shiki. In fact, this style seems to be more widely used in the Western "fandom" world—on platforms like AniDB, Danbooru, and others—than the two "official" systems.