No disrespect to anyone but you simply can not compare teams like that.
For one, you are Japanese team and when you started you were already in Division 2. For Australian teams, they start in Division 4 (US starts in D5). You are at a huge advantage if you want to compare it that way because starting in Division 2 entitles you to a lot higher income in the form of merchandising, tv revenue and larger fan base for your home games. With this extra money, you can buy better players a lot quicker.
unless you find another Japanese team to compare it with (or one where the user base starts in D2), you simply can not compare how good your managerial skills are with other teams from other countries that had a lot tougher route to get into D2.