I don't know but I question if it's the best use.
Here is an old article about the cost -
http://koukokudairiten.info/outdoor-advertisements/
TBH, unless PC is targeting the general population this seems way too expensive. Even with the weak Yen. If they are, that's a bold move instead of targeting westaboo/otaku's interested in a unique new pocket of fandom.
Maybe PC is making lots of money, their watch hours are on the rise and just half of VSPO's. I hope so. Either way, it's cool advertising.
Edit - I've been told that this website is for static images and digital is like 50k for a week. The image from posted here shows at least 4 separate advertising screens. Hope it works out and glad it's not as expensive.