This will depend on your OS and configuration, but normally, you just print the Unicode string. If your OS, default terminal encoding, and font support Japanese, you only need:
>>> s = u'\u30c9\u30e9\u30b4\u30f3'
>>> print s
ドラゴン
On Linux, this requires your terminal to be properly configured to (typically) UTF-8.
On Windows, you need an IDE that supports UTF-8, but if using the Windows console, you will get a UnicodeEncodeError
unless using a localized version of Windows that supports Japanese, or changing the system locale to Japanese. Another workaround is to use win-unicode-console and install a Japanese console font.
My example above used the PythonWin IDE that comes with the pywin32 module, and also works in the Python IDLE IDE that comes with a standard Python installation.