Gojo was just training Nobara, Itadori and Megumi until they get teleported to the IRL world, they were confused and shocked, they weren't in Japan anymore

Gojo: this place looks new

Megumi: This place does not look like Japan, Sensei what should we do?

Itadori: did we just get teleported!?

Nobara: weren't we training a few seconds ago?

they were in a crowded city and they saw many people passing by