You can't call yourself Japanese if you don't know the classics.

[ He gives a nonchalant shrug as he speaks, holding the bag of fish in his right arm. Normally, he'd reject the offer, but due to the state of his left arm... ]

Yeah, that'd be great. You can carry the rest of the ingredients once I buy them.

[ Shirou's already carrying two bags in his right arm, after all. He could probably carry more than just that, but... It would be pretty rude to say no to a kind offer, especially since he's not buying as much as he usually has to. ]