Importance of contemporary political philosophy has increased in recent decades. Since the 1970s, studies of Marx’s theories have become an important part of the discussion within contemporary theories of justice. More extensive studies concerning Marxist political philosophy from multiple perspectives are becoming a focal point in other fields of academic research. “How to understand Marx’s political philosophy?” has been a classic question for over a hundred years. Not an academic philosopher himself, Marx seems not to have issued a complete or consistent political philosophy by today’s standards, so it is only natural that his views would be interpreted differently by different scholars. While it is justifiable for us to construct Marx’s political philosophy, we must do it through a comprehensive theoretical reflection, and our construction must take full account of the history of the interpretations of Marx’s political philosophy. This applies especially of his theory of justice—a history which has lasted for more than a century. It is even more important for us to reread the original texts, particularly Marx’s early philosophical writings, and take them as the textual foundation for Marx’s political philosophy.