I had good info on this and I'll see if I can find it but from what I remember most if not all the Japanese will be fairly similar. It mainly comes down to what water they were intended to work with and how they react with the minerals in the water. Since Japanese coolant come pre mixed and are designed for the water in Japan (I forget if they were low mineral content or high mineral content vs euro, USA) and the same seal materials used to work with that content then they should be fairly compatible.
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