Is this a thread about making Japanese food at home?

Here in Germany, we don't have a "hard" lockdown. There are even a few Japanese restaurants still open, offering sushi to go. But as a good citizen, I am trying minimizing my social contacts of course.

So I want to make sashimi out of frozen fish at home. I understand frozen fish (salmon and tuna) is safe, because at some point, it was frozen at -30C, which is supposed to kill any worms.

I have soy sauce. But where do you get wasabi? Supermarkets only have "wasabi paste", which looks (and tastes) quite differently from wasabi served at Japanese restaurants.

Also, some Japanese restaurants have salmon roe with a very low salt content they use to prepare certain dishes, like "ikura oroshi". I like it much more than salmon roe sold at supermarkets, which has lots of salt in it. Any idea where one can buy such salmon roe and how is it called?

Thanks, and everybody stay healthy of course