Introverted Sensing (Si): Japan is very traditional and likes his environment to be predictable. Without his usual routine (i.e., a certain amount of time soaking in the tub, particular foods, etc) he tends to freak out or get uncomfortable. He tends to follow his own traditions closely and to the letter, demanding others ‘take responsibility’ and marry him for hugging him and other similar traditions of the type. He’s careful about what he says, and tends to follow orders from the higher ups even if he doesn’t agree with them, and responds to other peoples’ behavior by adjusting his own to better fit in. He often takes care of the practical details among the axis powers, particularly food. He enjoys commemorating experiences by taking photographs.
Extroverted Feeling (Fe): Japan is known for sensing the mood and refraining from speaking. He is very tactful, conscious of the emotional atmosphere around him, sensitive to others feelings and conscious of any kind of possible offense. He avoids being definite or decisive; he tries to find ways of agreeing without actually agreeing. He’s quick to act to make others feel better (i.e., putting the cat ear headband on Greece to fulfill his wish to be a cat), and more accommodating than is good for him, often leading to him being taken advantage of. He’s also a touch chameleonic, taking on traits of those around him to better accommodate them (Italy and France, for ex.)
Introverted Thinking (Ti): He usually keeps his logical criticisms to himself. He searches for explanations for why certain things occur or why people behave in such-and-such a manner, but it’s an internal search and in keeping with his interest in maintaining the peace, he rarely shares his conclusions. He’s quick to grasp a system and then turn it into something else, such as in his younger days when he took China’s system of writing and created his own instead.
Extroverted Intuition (Ne): He tends to resist change and is often put off by new experiences. He does certainly have a creative side, which he puts to use in the aforementioned writing incident, or in coming up with various ways to avoid being specific. He dislikes having the door shut on new possibilities more than actually talking about or embracing them. He’s quick to ask questions and tries to better understand the world around him.