This chapter explores the concept of Work-Life Balance (WLB) and its significance in modern organizational contexts. WLB involves harmonizing work responsibilities with personal life, allowing individuals to balance their job commitments with personal activities such as family time, hobbies, and self-improvement. In Japan, where long working hours and traditional gender roles have historically shaped workplace culture, societal shifts—like an aging population and increased female workforce participation—are prompting companies to rethink their traditional work practices. Effective WLB management requires a holistic approach, including the implementation of flexible work arrangements, diversity management, and support for broader aspects of personal well-being beyond family responsibilities. Managers play a crucial role in creating an environment where employees feel supported in balancing their work and life commitments. The chapter also introduces the concept of Work-Life Integration, which acknowledges that the boundaries between work and personal life are increasingly blurred due to technological advancements and evolving work styles. This approach suggests that rather than strictly separating work and life, they can be integrated in a way that mutually enhances both. Throughout the chapter, it becomes clear that recognizing the diverse needs and values of the modern workforce, and adopting more flexible, employee-centered strategies, is essential in today’s work environments. By embracing flexible work arrangements and promoting a more inclusive approach to managing work and life, companies can improve individual well-being, boost organizational performance, and ensure long-term sustainability. WLB thus plays a crucial role in attracting and retaining talent in the competitive global landscape.