"Japanification" is a big and hard word, but it means that something looks like Japan!
Do you know what Japan looks like? It's a country in Asia with lots of people and colorful things. But sometimes people use the word "Japanification" to talk about changes happening in other countries that make them look more like Japan.
In this case, "Japanification" usually means that some big, important things are happening in a country that make it look more like Japan. For example, people might say a country is "Japanifying" if it has low interest rates (that's like the cost of borrowing money) or if it's having trouble with its economy.
It might sound a little bit complicated, but really it just means that things are changing and starting to look more like Japan in some ways.