Ten years have passed since the infamous split of the Yamaguchi-gumi, Japan's dominant Yakuza organization. The rupture led to a significant rearrangement of organized criminal activities, prompting intensified police monitoring that persists today. Despite the upheaval within the Yakuza - often regarded as Japan's "shadow society" - the enduring alertness of local law enforcement has contributed to the relative peace and stability amidst potential crime waves.

In Japan, although the Yakuza have historically been a part of society, recent decades have seen an increased effort in curbing their influence. The Japanese public largely supports these crackdowns, valuing safety and peace over an "underworld" operating within their communities. The Yamaguchi-gumi split was a significant event, raising concerns of potential disruption to societal order.

Contrary to the US and EU, where organized crime groups are outrightly illegal, Japan has a unique approach towards the Yakuza, which are semi-legal entities operating with certain regulations. While measures against organized crime have intensified, the historical presence and significant influence of these groups complicate their eradication.