Japan/China

The pairing of Japan and China is more of a brotherly bond if anything. China found a younger Japan or known as Chibihon and took him in and raised him as his younger brother in his image or at least that's what China wanted. Japan would take in parts of China's culture that he was taught and made drastic changes to them such as when China taught Japan how to write in his language only for him to make his own style. Even though China has raised Japan from childhood Japan still puts up emotional barriers between them.