According to a recent listing of sales estimates on Dengeki Online, Kirby Star Allies has surpassed over half a million physical copies in Japan! That's quite the feat for such a short amount of time since the game's release.
Kirby Star Allies seems to be doing fantastically well, as we've previously reported that the game is the fastest-selling in the series in the UK. Nintendo's recent financial briefing also states that the game has sold over 1.26 million copies worldwide.
Rock on, Star Allies!