I think more can be said but here is a similar question with a good answer. (I assume the comparison is criminal organizations in other countries, but this might want to be clarified if it isn’t correct).

• Why is organized crime such as Yakuza still thriving but Al-Capone style Italian mob disappeared? answered by u/blackflag415

The gist is that the government and others found the yakuza useful at times. Thus politics, business, and underworld elements interacted for their own ends. So echoing the answer, Japan is just structurally and institutionally different. Here is also an answer regarding the use of the yakuza.

• I heard that the Japanese government in 60s/70s used the Yakuza to break up union strikes, fight against protesters, etc. Is there any truth to this? answered by u/Vox-Triarii

In regards to the origin of the yakuza, I agree more with this answer than the idea the centuries old samurai lineage. Some of the modern organizations were just underworld developments, but like the answers (above) attest there isn’t one yakuza.

• The origin of the yakuza is often cited to be ronin, or masterless samurai. To what extent is this true, and how did they make the transition from Edo-period samurai to modern-day criminal organizations? answered by u/foppery-andwhim