Article: Designed by Masayuki Uemura, the designer of the original Famicom, the Super Famicom was released in Japan on Wednesday, November 21, 1990 for 25,000 (US$210). It was an instant success; Nintendo's initial shipment of 300,000 units sold out within hours, and the resulting social disturbance led the Japanese government to ask video game manufacturers to schedule future console releases on weekends. The system's release also gained the attention of the Yakuza, leading to a decision to ship the devices at night to avoid robbery.

Question: What criminal group plotted to steal Super Famicoms?
the Yakuza