Best Answer: It looks like Japanese Katakana. If you google, you can find a cheat sheet that will tell you the sound of each of those symbols. They are mostly used to represent words that have no equivalent in the Japanese language and they will phonetically spell out the word. Like "United States" would be "United States" in Japanese, but would be spelled out phonetically in Japanese characters.
Yes the red stamp in the corner is their name, not so much signature. It is a tradition born from calligraphy and 'seals'. I don't know about Chinese, but I know it is very common in Japan, and would assume that the same can be said for anywhere that uses Chinese symbols. Hope this helps
The origin is from the Chinese emperor's "seal of approval", something you'd call a "signature" in today's terms, his jade seal, used to approve of documents. It is from this seal, that poets & painters made smaller seals: If you made anything bigger than what the emperor has, it is implied that you are more powerful than the emperor, and therefore would lead to your death sentence. It is from China's model that Japan & Korea & most of SE Asia followed. I don't know why red ink was allowed: Only the royal family can use cinnabar which produces red ink. Everybody else has to use black ink, because if you're not part of the royal family and use red ink, it might lead to your death sentence. In ancient China, when a person's name is written in red ink, it means that person is a dangerous criminal.