Something missing from the history books: Sega were all set to distribute the ColecoVision in Japan: https://retrocdn.net/index.php?title=File%3ACashBox_US_1982-04-03.pdf&page=62 I don't think a Japanese ColecoVision ever existed. But you know what did exist? The SG-1000. This announcement came in April-ish 1982, but the SG-1000 didn't launch until July 1983. Plenty of time to put together a ColecoVision plan, decide that it sucks, copy some of the technology and produce your own console (and computer... and then upgrade it down the line with the Master System and Mega Drive). Freaky deaky.