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Summoning Technique: Ninken - the summoning of specially trained ninja dogs used by Kakashi Hatake. These ninken possess heightened senses, can speak in human language, move across water (and therefore use chakra), devise battle strategies, and track a target by scent. They are capable of acting both alone and in a pack, and when necessary, they employ a special tracking technique, burrowing underground and following the enemy's scent until they catch up with him. Kakashi can summon either a single ninken or the entire pack of eight dogs, choosing the appropriate option depending on the task.