Wow, this game has been strange (punishing me for breaking history and bringing Rome back). After the 600 year old heir, I do some conquering, and this happens:
Please note I can't see any province on Japan. Also this happened twice. both times I wasn't near the BB limit and Japan peaced out in a year. I'm assuming they don't like it that another country has a ruler titled "Emperor".
A few other things:
Tripoli was later Annexed by Algiers, a relief to mapmakers everywhere
Notice both the Uber Poland and Uber Lithuania, and how England has plenty of territory dotting the coast of Europe (and Metz, because why not).
Please note I can't see any province on Japan. Also this happened twice. both times I wasn't near the BB limit and Japan peaced out in a year. I'm assuming they don't like it that another country has a ruler titled "Emperor".
A few other things:
Tripoli was later Annexed by Algiers, a relief to mapmakers everywhere
Notice both the Uber Poland and Uber Lithuania, and how England has plenty of territory dotting the coast of Europe (and Metz, because why not).