EDIT: I think I misread your question the first time. It can be difficult mostly because firms here are used to having employees who are generalists, work in every part of the company through the years, and become upper management who have a much needed knowledge of the whole company. In the west in general, we focus on one area and change companies to grow our skills in that field. This is a problem because its really hard to change companies in Japan and Japanese employers often want you to learn new skills to work in different areas of the company. In short, it's difficult to become a specialist in Japan without sacrifice (usually salary). But there are many new technology companies that are trying to change that pattern.
[1]https://www.japantoday.com/category/national/view/no-of-suic...
[1] http://www.kalzumeus.com/2014/11/07/doing-business-in-japan/
It must be imperative in daily life, but how about in the work environment?
そうして来月のN2試験に集中しないと問題になります。