There is already another Ming. Thread. Yes Ming has some mechanics playing in their Hands and that need to be changed.
Now some tips for a way play japan.
As Japan it should not be the biggest problem to win a few war against them. Develop your provinces, Japan can get strong dev bonuses and are also very good in teching. As extrem tall player I have around 1000 development during 1650 and 1500 till 1720. While being on the latest tech.
Also use pirates against Ming. You will always have a superior fleet if you do everything right and pirating them gives you gold, power projection and make their huge amount of money a little bit smaller.
Colonisation should focus on North America(Mexico and California, maybe Rio Grande) as they flow into your trade node.
How to disable Ming,if you don't want to conquer Ming.
Release small Nation, as you won't be able to beat completly during first war, because of their merc spam, except you also want to use trillions of mercs. Declare War, while they are on War and sinking their fleet and them blockading most of Ming Coast will also weaken them. Go for peace already at 30-60% to release only one or two nation and some money in the first wars. If it's weaken enough you can try getting 100% Warscore.
Ming now is extremly strong so if you want to disable you should start now, I could take 100 years or more.
If you don't plan on taking him down, be sure to still have a big army and even more important a bigger fleet or a sizeable fleet and he never will pose a thread, even together with Korea.