No it's not a typo (just an inside joke), but we are actually talking about Data East and Data West. This includes the games they developed, published, and even the pinball titles available. It may not seem it, but Data East was a limited and significant developer of the mid-late 80s and just about all of the 90s.
Special thanks to Retronauts Episode 88 (1up Run), Brandon Sheffield (and his blog/podcast Insert Credit), as well as Topless Robot for your Data East and extensive Data West information.
Also be sure to check out the ASCII RPG/roguelike Sanctuary, for free, at the following address: http://blackshellgames.itch.io/srpg