Is you are on a tourist visa then you cannot work. Actively working as a nomad ok a tourist visa waiver is breaking the law.
Of course, nomads often did come and with in this status. They would exist in a grey area, arguing their with was more incidental in nature and bit the reason to be in Japan (just like replying to a few with emails while in holiday).
The nomad visa is essentially formalizing this grey area. As other commentors have mentioned, it's not a particularly useful status as you don't get a residence card and you can enroll in national health insurance too. You'll also find it harder to find apartments to rent too
Of course, nomads often did come and with in this status. They would exist in a grey area, arguing their with was more incidental in nature and bit the reason to be in Japan (just like replying to a few with emails while in holiday).
The nomad visa is essentially formalizing this grey area. As other commentors have mentioned, it's not a particularly useful status as you don't get a residence card and you can enroll in national health insurance too. You'll also find it harder to find apartments to rent too