Do clerks in Japanese companies have to be able to speak Japanese? Do you need to type in Japanese at work? What else is there to do?

Generally speaking Japanese is required. There are also unnecessary ones. The general work content is drafting documents, translating Japanese materials, copying and printing materials, distributing materials to employees, preparing materials before meetings, taking meeting minutes, etc. It is generally required to be able to speak some Japanese, be able to use office software, use a printer, copy machine, fax machine, and send emails, etc.