This paper aims to describe new directions of sociology for the studies of the labor market in Japan. For related studies, I review the following three research areas – (1) long-term employment custom and seniority-based wage system, (2) social security system, (3) transition from school to work. The problems are that theories on which the past researches relied don't adequately explain observed characteristics in the Japanese labor market, and they view individuals as either “oversocialized” or “undersocialized.” Then, I seek several directions to overcome them. The emphasis is placed on to focus on multiple outcomes of labor markets, matching processes between workers and employers, and institutional mechaniams and their changes.