Microsoft Game Studios vice-president Phil Spencer asked the crowd at his Tokyo Game Show keynote today to forgive him while he, well, gloated a little bit. According to Spencer, Halo: Reach had generated $200 million in sales after just one day on store shelves. The game also surpassed Halo 3’s record for most simultaneous Xbox Live users online at one time.

Some other nuggets from Spencer’s presentation:

• The Xbox 360 has been the top-selling console in North America for three months running. It is also supposedly the No. 1 console in Europe, although Spencer offered no numbers to back up that claim. (He says it is based on Microsoft’s “sell-through data.”)

•  Five of the top six best-selling games in Xbox Live Arcade history were made by Japanese developers. They are, in no particular order, Marvel vs. Capcom 2, Street Fighter 2, Super Street Fighter 2 HD Turbo Remix, Bomberman Live, and Castlevania: Symphony of the Night. So apparently, XBLA customers like to buy games they’ve already played on other consoles.

• Japanese games for the Xbox 360 have accounted for $2.1 billion in sales to date (conversion rate: 10.5 Halo: Reach launch days). That’s more than double the $1 billion in Japanese games sold over the lifespan of the original Xbox.