Complex sentence: This type is the main reason for the negative reputation of Shukko, because of the lifetime employment and seniority system, companies have to force the employees to transfer from one post to another post in an attempt to reduce personnel expenses.
Split into simpler sentences: This type is the main reason for the negative reputation of Shukko. Because of the lifetime employment and seniority system, companies have to force employees to transfer to another post in an attempt to reduce personnel expenses.