[Nyororin]

Can you read and quickly type in - correctly - Japanese names from book covers and hand written lists? Do you feel that you could confidently put them in order on the shelves as quickly as a Japanese person? Could you write up book selling forms and member applications, handwritten and accurate, for customers?

I definitely can`t say the same for myself, and I read novels in Japanese on a regular basis. You can`t have a dictionary on hand to check the readings of different authors names or book titles.
I would say that is a pretty good reason not to hire someone. The work isn`t all just ringing stuff up at the counter, which I am sure you could do. A high level of language skill is a lot more necessary than you may realize at first glance.