この先 could be vaguely translated as “from this point onwards”, which usually has
a temporal meaning “from now on”, but in this case it’s meant to be spatial,
“don’t walk past this sign”.
Honestly they should post this somewhere more conspicuous than a hotel in northern Japan if they want humanity to get the message, maybe at the Shibuya scramble or Times Square.
Vivia 🦆🍵🦀
fushimi