You can see Japanese characters by installing appropriate fonts into your system. Unless you have any Japanese fonts, you can use Shodouka service which converts Japanese texts into graphic images. If you can't understand Japanese at all, I strongly recommend to visit Scientific American magazine 's web site. They always introduce a lot of SF-like topics, which are belonged to science rather than science fiction, in English. The title banner contains some Japanese characters.
Event horizon is a scientific term which stands for the boundary between a black hole and our space.