My ability to read cursive is equally bad but my best guess would actually be
indicating that the proprietor fell ill. I would prefer not to believe it... but either way, it's a shame that I never had a chance to visit and try its incredibly unique menu. The ice cream ramen seems to have been...
Actually, a Japanese blog identified it as a quaint - and bizarre - little place called 菊や (Kiku-ya), which has since shut down.
The photos of the place, which you can find in Google Maps and the like, are quite an exact match.
It's definitely unnerving waiting in the dark for the bus to come in a remote location... you start to hope that the bus you missed is actually running late for some reason and will suddenly arrive, just so you can get out of there sooner.