While researching for an introduction I'm writing for OITG's collected .cbr of the "Mutant Turtles Gaiden" manga, I wound up absorbing quite a bit of knowledge regarding the Japanese releases of the classic TMNT video games for the Arcade, NES, Super NES, Genesis and Gameboy.
Rather than let that knowledge go to waste in the back of my head, I decided to add it as a new section to my older article, The (confusing) History of the TMNT in Japan. If you're interested, give it a look. You may be surprised by some of it.