- Location
- Europe
I'm not too worried about this part personally - sealing research doesn't actually need chakra for the SCs and Itachi doesn't know Hazou knows Primordial Sealing, or that it needs a lot of chakra to perform. He has no real reason to expect the researching part to need Noburi, I think his first thought would more likely be about SC training if he thinks about it at all. More likely IMO he just views Noburi as yet more leverage on Hazou like the others.
Shadow Clone research for sealing makes more sense than training. Itachi would think that Hazou can make a bunch of SC's for research, they only need to draw and infuse seals under completely normal circumstances.
He knows nothing about 3D Runes details.
Also Summoning.
Shadow Clones are not a training teachnique.