Gerund series briefly interrupted to deliver this breaking news: today is the last Friday in October, and therefore you have two days left to get your Oktoberfest on. Recommended locations: Baden Baden, Zum BIERHOF (where they do the “Prost” song/dance every 30 minutes or so, kind of like an Epcot exhibit in the middle of Shinjuku), and Frigo.
In honor of the end of October, the cool kanji today is 独. It means “alone” or “single” and also Germany because it’s used in the ateji for Germany (独逸). Newspapers and news programs use it often to refer to the Deutschland, especially when it makes abbreviation easy – e.g. 日独関係 (Japanese-German relations).
Every country has kanji (here is an awesome list), but not all of them get used. The third column in the chart on Wikipedia has the abbreviated version (略称), and it looks to me like those are the ones you see most frequently. Knowing these will be useful when you make that appearance on a Japanese quiz show as the token foreigner someday.
I think Russia (露) and France (仏) ended up with the coolest kanji. The Soviet Union (蘇) had a cool one, too. Another link if you’d like more detailed explanation of each kanji in English.