Short answer
It is safest to call STRANGER THAN HEAVEN a new RGG Studio title, not an officially labeled Yakuza prequel yet.
Its developer, tone, yakuza organizations, underworld structure, and historical scope naturally invite Like a Dragon comparisons. However, the checked official pages describe STRANGER THAN HEAVEN on its own terms rather than using a simple "Yakuza prequel" label.
Why people think it connects
- It is made by Ryu Ga Gotoku Studio.
- The story features yakuza organizations and long-term underworld history.
- The 1929 section includes Makoto becoming involved with the Iwaki Family.
- The title evolved from the project many fans knew as Project Century.
What is not settled
- Whether it shares continuity with Like a Dragon.
- Whether any known clans, families, or locations are canonical predecessors.
- Whether SEGA will market it as a standalone game, spinoff, or connected origin story.
How to read the connection
Until SEGA or RGG Studio confirms shared continuity, the safest reading is that STRANGER THAN HEAVEN has strong Like a Dragon DNA but remains officially presented as its own title.