Reishiki refers to the etiquette and ceremonial practices observed in Aikido, which is a Japanese martial art. Reishiki encompasses the formal behaviours and rituals that are integral to the practice and philosophy of Aikido. These practices are deeply rooted in Japanese culture and are designed to foster respect, mindfulness, and a sense of connection among practitioners.

Reishiki includes various forms of bowing, which are expressions of gratitude, respect, and acknowledgment of one's place within the hierarchy of the dojo (training hall). The depth and manner of bowing can signify the relationship between individuals, with deeper bows often indicating greater respect or a lower rank in the hierarchy.

The practice of Reishiki is not only about physical gestures but also about the mental and spiritual attitude one brings to the dojo. It is intended to expand one's sense of self through mindful interaction with others and the world. This includes a respect for nature, fellow humans, and the martial arts tradition. Proper Aikido training, combined with the practice of Reishiki, aims to absorb life-enhancing attitudes that contribute to creating a more harmonious world.

In the dojo, Reishiki can involve specific commands and responses, such as bowing to the front of the dojo (shomen), to the instructor (sensei), and to fellow students (yudansha). These rituals help to prepare the mind for practice, reinforcing awareness, safety, and a dedication to the philosophical aspects of Aikido.

Reishiki in Aikido is a comprehensive set of practices that guide the behaviour and mindset of practitioners, emphasizing respect, humility, and a deep connection to the art and its community.