Pros
If someone wants to enter Japan with a job then fine otherwise they have no pros.
Cons
Their salary structure is very very poor, No bonus system. After a project is completed, if they are not able to manage a project for you, you will suffer. Your salary will be reduced. You will not get full salary, only 60% salary and the salary calculation process is as follows: (salary/30) *working days*(60/100). So if someone has a salary of 300k yen per month, he/she will get 6k yen after tax deduction. They always take huge amount of money for you by lying about you to the project company. And that's why the project company has high expectations on you. So when they see that you don't have the capabilities that your company told them, they don't continue the project and you suffer. Bad Management system. They even don't know how to deal with a foreign employee.