The intelligence group was a group of mercenaries working for CEO Jeff Go. Every member was highly trained for combat and could not be stopped, even if they were facing the most notorious yakuza in Japan.
When Tanaga told Jeff that his uncle left a threat before leaving, Jeff wasted no time and ordered his group to take action. He knew well that if his friend called during the middle of the night, he was asking for help.
Tanaga pleaded Jeff to follow his uncle since he felt that he had no good intention. He was worried that his wife and child would be the targets.
He wasn't wrong, because what he heard during the conversation between his uncle and the yakuza leader while drinking proved his worries were realistic.
Without wasting time, Tanaga gave Jeff the signal to act to make sure that his family would stay safe at all costs.