Learning device and learning method

A learning method for a learning device configured to perform learning of a decision tree, the method comprising:

• outputting a second address including learning, by each learning unit of a plurality of learning units, a first node using learning data that is acquired by using first addresses related to a storage destination of the learning data corresponding to the first node of the decision tree in one of a plurality of data memories each corresponding to one of the plurality of learning units, and outputting a second address related to a storage destination of each piece of the learning data branched from the first node;
• and
• calculating, by each of a plurality of managers each corresponding to a learning unit of the plurality of learning units, third addresses related to storage destinations of learning data corresponding to second nodes being next nodes of the first node using the first addresses and the second address output from the learning unit.