Kashimo Hajime was revived to fight Sukuna, and not in the same era that he lived in... so... it was being difficult to explain the things that are currently happening here.

"Are you telling me... that this shiny little trinket with lightning energy and with such a tiny thing... can do more than a thousand things?"

You nodded, almost with a twitch in your eye after trying to explain that your cell phone is important to you and that he shouldn't break it no matter how difficult it is to use.

"Do you seriously entertain this? In my time it was fighting to make yourself stronger! Now... people talk to... what was that thing called?" He thought for a few seconds to remember. "That's AI... robotic intelligence... You're all lost."