Very simple and was more based on culture fit, also make sure that you know math. It is also very good to know your time tables. It is also very dependent on the location you are at.
I met with the manager, and they asked me about my previous experience of teaching or working with Kumon. They ask about their vision/mission statement. It's really casual because though it's a big company, each location has only one manager.
You need proof of residence and ID, and must take a timed test covering basic 5th-grade math skills. It's straightforward but requires quick thinking and accurate calculation. I don't recall taking an English test version but they were nice.