I received a letter before arriving in Japan

It's signed by an... "I-8".

You know... While it is true that my skill in German needs some polishing,

Is terrible at Japanese and German....

So in other words, the author of this letter...

Could you not call out like the clerk at an inn?

So, hey...

What are you, Banjisewa Kuro? You could replace this with, say, Basil Fawlty

I think that this kind of malicious mischief warrants it, yes.