[A full hour? It seems odd to Hanabi, but ninjas aren't taught about things like that. They're taught not to eat large breakfasts so they can be on the move almost immediately after eating if necessary.]

Yes.

[She holds up her Watch-issued shuriken first.]

These are only for throwing. But these...

[She holds up the kunai]

These can be used for throwing at an enemy or for close combat.