The entire company.
It's actually possible that just the gaming division of Sony would be worth more than the entire company because the other divisions make losses. Also, Sony has quite a bit of debt, while Nintendo has 0 debt and the aforementioned $10B cash hoard ($15B when including non-cash assets, equal to 1.2 trillion yen).
--
Congratulations to SuperNiceDog, Guru Winner, who was smart enough to pick
your 7 time champion, Link.