Naiku is a traditional Japanese practice of self-reflection and introspection. It involves contemplating one's thoughts, feelings, and actions to gain deeper self-awareness and understanding. This practice is often associated with mindfulness and can be beneficial for personal growth and emotional well-being. In Naiku, individuals typically set aside time to think about their experiences and the lessons learned from them. This can include reflecting on relationships, challenges, and achievements. By engaging in Naiku, people aim to cultivate a more meaningful and purposeful life through enhanced self-knowledge.