Of course, while the original Shin Megami Tensei V was exclusive to the Switch, Vengeance has been released on Switch, Steam, PS4, PS5, Xbox One, and Xbox Series X|S. Still, this is quite the accomplishment for what has consistently been considered a rather niche franchise.
Translated via Google:
"[Shin Megami Tensei V] series has sold over 1.6 million copies worldwide! In addition, [Shin Megami Tensei V: Vengeance], released on June 14th, has sold over 500,000 copies worldwide in just three days! We would like to express our sincere gratitude to all of you for your patronage and support."
In addition, the Shin Megami Tensei V 'series' has now surpassed a total of 1.6 million sales worldwide. This means that Vengeance has sold almost half the total sales of its predecessor in just a handful of days. Crikey!