Police on Tuesday arrested three men, including the son of the head of the pro-Pyongyang group Chongryon, on suspicion of illegally importing a shipment of matsutake mushrooms from North Korea.
Masamichi Kyo, 50, whose father is Chongryon chief Ho Jong Man, runs a Tokyo-based company affiliated with the organization.
The investigation — carried out by Kyoto police and three other prefectural police forces — involved raids in March on sites related to Chongryon, also known as the General Association of Korean Residents in Japan.