The Switch is a bonafide hit worldwide, but there are certain regions where Switch success is on a completely different level. Japan is definitely one of those regions, and we can see that through some comparison data.
In the Switch's 97th week of sale in Japan, the platform has sold a total of 7,046,766 units. At the same point in its lifespan, the Wii had sold 6,831,647 units in Japan. It took Wii 105 weeks of sale to reach 7,064,622, which would put it just a bit ahead of where Switch is now. We all know how huge the Wii's success was, which makes what Switch is pulling off even more impressive.