Hiruzen Sarutobi surveyed the restaurant, noting that the décor and furniture were significantly different from what one would find in Konoha.
Considering that the restaurant disappeared for a while after people entered, it must not be a restaurant that existed within Konoha.
It was unclear which time-space Ninjutsu was responsible for this phenomenon, allowing this ordinary wooden door to appear out of nowhere and even withstand the Fire Jutsu of the Uchiha Clan.
Even attempting to destroy it with ninja tools was futile, which piqued Hiruzen's interest; he had even secretly used some advanced Ninjutsu, but to no effect on the door.
"I wonder how this door's defense compares to the Summoning Jutsu: Rashomon in terms of strength," mused Hiruzen as he stroked his beard, then subconsciously reached for his pipe.
But remembering his promise to the restaurant's manager, he placed it back down.