What Is Reiki? Complete Guide to the Japanese Energy Healing Practice

What Is Reiki?

Reiki (pronounced "RAY-key") is a form of energy healing that originated in Japan in the 1920s. The word itself comes from two Japanese kanji characters: "rei," meaning universal or spiritual, and "ki," meaning life force energy. Together, Reiki translates roughly as "universal life force energy" or "spiritually guided life energy."

At its core, Reiki operates on the principle that a trained practitioner can channel healing energy through their hands into the recipient's body. This energy is believed to flow to wherever it is most needed, supporting the body's natural healing processes and restoring balance to the physical, emotional, mental, and spiritual dimensions of well-being.

Unlike many other healing modalities, Reiki requires no special equipment, medications, or physical manipulation. The practitioner simply places their hands lightly on or slightly above the recipient's clothed body in a series of specific positions, typically starting at the head and moving down through the body. Sessions usually last between 60 and 90 minutes.

Reiki has gained increasing acceptance within mainstream healthcare. A 2017 survey found that more than 800 hospitals across the United States offered Reiki as part of their integrative medicine programs (Dressin and Singg, 2017). Major medical centres including the Cleveland Clinic, Johns Hopkins, and Memorial Sloan Kettering Cancer Centre include Reiki among their complementary therapy options.

History and Origins of Reiki

Reiki was developed by Mikao Usui, a Japanese Buddhist scholar, in March 1922 after a 21-day meditation retreat on Mount Kurama near Kyoto, Japan. According to traditional accounts, Usui experienced a profound spiritual awakening during this period of fasting and meditation, after which he discovered he had gained the ability to heal through touch without depleting his own energy.

Usui founded the Usui Reiki Ryoho Gakkai (Usui Reiki Healing Method Society) in Tokyo in April 1922 and began teaching his method to others. He developed a system of hand positions, symbols, and attunement practices that could be passed from teacher to student. Before his death in 1926, Usui trained approximately 2,000 students and certified 16 Reiki Masters.

Reiki Comes to the West

One of Usui's students, Dr. Chujiro Hayashi, a retired naval officer, further systematised Reiki into a clinical practice. Hayashi opened a Reiki clinic in Tokyo and developed the standardised hand positions still widely used today. It was at Hayashi's clinic that Hawayo Takata, a Japanese-American woman from Hawaii, first received Reiki treatments in 1935.

Takata trained under Hayashi and became the first Reiki Master outside of Japan. After returning to Hawaii, she spent decades teaching Reiki throughout the United States and Canada. Before her death in 1980, Takata initiated 22 Reiki Masters, who then continued to spread the practice globally. Today, millions of people worldwide practise Reiki, and the International Association of Reiki Professionals estimates there are over four million practitioners across more than 60 countries.

How Reiki Works

Reiki practitioners work with the concept that every living being possesses "ki" (also known as "chi" in Chinese tradition or "prana" in Indian philosophy), a vital life force energy that flows through and around the body. When this energy flows freely, a person experiences health and vitality. When it becomes blocked, stagnant, or depleted, physical illness, emotional disturbance, or mental fatigue can result.

During a Reiki treatment, the practitioner serves as a channel or conduit for universal energy. They do not use their own personal energy. Instead, they are trained to connect with a limitless source of healing energy and direct it through their hands to the recipient. This distinction is important: practitioners report that giving Reiki treatments actually leaves them feeling energised rather than depleted.

The Energy Body and Chakras

Reiki works primarily with the body's energy centres, known as chakras in the Hindu-Buddhist tradition. The seven major chakras align along the spine from the base to the crown of the head, each governing different aspects of physical, emotional, and spiritual functioning. Reiki practitioners direct energy to these centres, along with any areas of the body where they intuit blockages or imbalances.

Modern biofield science offers some supporting frameworks for understanding Reiki. Research by Rubik et al. (2015) has documented the existence of measurable electromagnetic fields around the human body (the "biofield"), and studies have shown that the hands of energy healers may emit electromagnetic frequencies within therapeutic ranges.

In Japanese healing tradition, the concept of ki extends far beyond the physical body. Ki is understood as the animating force of all creation, flowing through every living being and connecting all things. This perspective is shared across many Asian healing traditions: Traditional Chinese Medicine calls it "qi," Indian Ayurveda calls it "prana," and Hawaiian healing tradition calls it "mana." Each describes a similar fundamental energy that sustains life and promotes healing when in balance.

The Five Reiki Principles

Mikao Usui established five guiding principles (called the "Gokai" in Japanese) that form the ethical and spiritual foundation of Reiki practice. These principles are not religious commandments but rather daily intentions designed to promote personal growth, inner peace, and mindful living:

Just for today, I will not worry. This principle encourages releasing anxiety about the future and trusting in the natural unfolding of life. Worry creates mental tension that can manifest as physical stress, disrupting the free flow of ki energy.

Just for today, I will not anger. Anger is recognised as a powerful energy that, when held onto, creates blockages in the body's energy system. This principle does not deny the existence of anger but encourages acknowledging it and choosing to let it go rather than allowing it to control your responses.

Just for today, I will be grateful. Gratitude shifts awareness from what is lacking to what is abundant, naturally raising one's energetic vibration. Regular gratitude practice has been associated with improved psychological well-being (Emmons and McCullough, 2003) and better physical health outcomes.

Just for today, I will do my work honestly. This principle extends beyond professional integrity to encompass living authentically, honouring commitments, and expressing one's true self in all interactions. Honest living removes the energetic drain of maintaining false appearances.

Just for today, I will be kind to every living thing. Compassion and kindness toward all beings, including oneself, creates a harmonious energy field that supports healing. This principle reflects the interconnected nature of all life, a cornerstone of Reiki philosophy.

The phrase "just for today" is significant. Rather than demanding permanent perfection, these principles invite practitioners to focus on the present moment, making each day a fresh beginning for spiritual practice.

What Happens During a Reiki Session

A typical Reiki session takes place in a quiet, comfortable setting. The recipient remains fully clothed and lies on a massage table, sits in a chair, or reclines in whatever position is most comfortable. Soft music may play in the background, and the lighting is usually dimmed to promote relaxation.

Before the Session

The practitioner typically begins with a brief consultation, asking about your health history, current concerns, and what you hope to experience from the session. This is also a good time to discuss preferences regarding touch (hands-on versus hands-hovering) and to ask any questions you might have.

During the Session

The practitioner places their hands in a series of positions, beginning at the head and progressing through the body. Each position is held for approximately 3 to 5 minutes, allowing energy to flow to that area. Standard hand positions cover the crown, temples, back of head, throat, heart, solar plexus, lower abdomen, and feet, though practitioners may also work intuitively on areas where they sense particular need.

Common sensations reported during Reiki sessions include warmth or tingling from the practitioner's hands, a sense of deep peace or floating, gentle pulsing sensations, seeing colours behind closed eyes, and profound relaxation. Some people fall asleep during sessions, which practitioners consider perfectly normal and even beneficial, as the body can receive energy equally well while sleeping.

After the Session

Following a session, practitioners usually recommend drinking plenty of water, resting if needed, and paying attention to any shifts in energy, mood, or physical sensations over the next few days. Some people report feeling energised, while others feel deeply relaxed or sleepy. Occasionally, recipients experience what practitioners call a "healing crisis," where minor symptoms temporarily intensify before resolving, which is interpreted as the body releasing stored tension or toxins.

Wear comfortable, loose-fitting clothing to your appointment. Avoid heavy meals or caffeine for at least an hour before your session. Come with an open mind but without rigid expectations. Let the practitioner know about any areas of pain, discomfort, or emotional sensitivity. Remember that Reiki complements but does not replace conventional medical care. If you are being treated for a medical condition, continue following your healthcare provider's guidance.

Benefits of Reiki

People seek Reiki for a wide range of physical, emotional, and spiritual reasons. While research continues to explore the specific mechanisms and outcomes of Reiki, practitioners and recipients commonly report the following benefits:

Physical Benefits

Reiki is widely reported to promote deep physical relaxation, reduce pain and muscle tension, support recovery from surgery or illness, improve sleep quality, and enhance overall vitality. A systematic review published in the Journal of Evidence-Based Integrative Medicine found that Reiki showed promise in reducing pain and anxiety across multiple clinical settings (McManus, 2017). A 2025 meta-analysis of randomised controlled trials confirmed that Reiki therapy significantly improved quality of life outcomes across diverse patient populations (Liu et al., 2025).

Emotional and Mental Benefits

Many recipients report significant emotional benefits, including reduced anxiety and stress, improved mood and emotional stability, greater clarity of thought, a sense of inner peace, and enhanced ability to cope with difficult life situations. A 2024 meta-analysis examining Reiki interventions for anxiety found statistically significant reductions in anxiety symptoms compared to control groups, supporting the therapeutic value of Reiki for emotional well-being (Chen et al., 2024). Research suggests that Reiki may activate the parasympathetic nervous system (the body's "rest and digest" response), which naturally counters the effects of chronic stress.

Spiritual Benefits

On a spiritual level, Reiki practitioners often describe deepened self-awareness, a stronger connection to intuition, a sense of meaning and purpose, enhanced compassion for oneself and others, and a feeling of being connected to something larger than oneself. While Reiki is not a religion and has no required belief system, many people find that regular practice deepens their spiritual life regardless of their religious background.

Scientific Research on Reiki

The scientific study of Reiki presents both promising findings and acknowledged limitations. Research in this field faces inherent challenges, including the difficulty of creating true placebo controls (since practitioners always know whether they are performing Reiki) and the subjective nature of many reported outcomes.

However, several well-designed studies have produced noteworthy results. A randomised controlled trial by Dressin and Singg (2017) found that Reiki significantly reduced anxiety levels in participants compared to both sham Reiki and a no-treatment control group. The study used validated psychological measures and controlled for practitioner expectations.

A systematic review and meta-analysis examined randomised controlled trials involving Reiki for pain management. The analysis found that Reiki was associated with statistically significant pain reduction compared to control conditions (Demir Dogan, 2018). These findings align with a large-scale effectiveness trial involving 1,411 Reiki sessions, which found significant improvements in physical and psychological health across multiple outcome measures (Dyer et al., 2019).

Research has also explored Reiki's physiological effects. Studies using heart rate variability (HRV) measurements have demonstrated that Reiki sessions are associated with shifts toward parasympathetic dominance, indicating deep relaxation at a physiological level. A study by Friedman et al. (2010) measured autonomic nervous system changes during Reiki treatments and found significant reductions in heart rate and blood pressure.

Some of the most compelling Reiki research comes from oncology settings. A large-scale study at a comprehensive cancer centre found that Reiki sessions significantly reduced symptoms of pain, fatigue, anxiety, nausea, and depression in cancer patients. The effects were observed immediately after treatments, with patients reporting an average 50% improvement across all measured symptoms (Birocco et al., 2012). While these studies do not claim Reiki treats cancer itself, they suggest meaningful benefit for symptom management and quality of life.

Types of Reiki

While Usui Reiki remains the most widely practised form, several branches and variations have developed over the decades:

Usui Reiki Ryoho is the original system developed by Mikao Usui, emphasising hand positions, the five Reiki principles, and three levels of training culminating in the Master/Teacher level. This remains the foundation from which most other forms have evolved.

Karuna Reiki was developed by William Lee Rand and the International Centre for Reiki Training. It builds upon Usui Reiki with additional symbols and techniques designed to work specifically with deep emotional healing and compassion. Karuna practitioners must already be Usui Reiki Masters before training in this system.

Holy Fire Reiki is an evolution of Usui and Karuna Reiki that was introduced in 2014. It emphasises purification, healing, and empowerment, with practitioners describing the energy as having a noticeably different quality: warm, enveloping, and deeply nurturing.

Jikiden Reiki (meaning "directly transmitted") represents the Japanese lineage of Reiki as taught before the practice was modified for Western audiences. It preserves the original Japanese techniques, terminology, and philosophical framework that Usui and Hayashi taught.

Kundalini Reiki combines Reiki with kundalini energy concepts from Indian yogic tradition. This system works specifically with the kundalini energy believed to reside at the base of the spine, using Reiki to safely facilitate its awakening and movement through the chakra system.

Learning Reiki: Training and Levels

Reiki is traditionally taught through a system of progressive levels, each building upon the previous one:

Reiki Level 1 (Shoden) introduces the foundational concepts of Reiki, the history of the practice, hand positions for self-treatment and treating others, and includes the first "attunement," a ritual process through which the Reiki Master opens the student's energy channels to receive and transmit Reiki energy. After Level 1, students can practise Reiki on themselves and others.

Reiki Level 2 (Okuden) deepens the practitioner's connection to Reiki energy and introduces three sacred symbols used to intensify treatments, provide mental and emotional healing, and perform distance healing (sending Reiki energy across time and space). The distance healing symbol is one of Reiki's most distinctive features, allowing practitioners to send healing energy to people who are not physically present.

Reiki Level 3/Master Level (Shinpiden) represents the highest level of Reiki training. Students receive the Master symbol, learn advanced techniques, and are taught how to perform attunements so they can train others. Becoming a Reiki Master is traditionally considered a commitment to a lifelong healing practice and a dedication to serving others.

Training times vary significantly among teachers. Some offer weekend intensive courses for each level, while more traditional approaches require months or years of study and practice between levels. The International Association of Reiki Professionals recommends at least six months of dedicated practice between Level 1 and Level 2 certifications.

Self-Reiki Practice

One of Reiki's great advantages is that it can be practised on oneself. Self-Reiki involves placing your hands on your own body in the standard hand positions, typically spending 3 to 5 minutes at each position. Many practitioners begin and end each day with a self-treatment, using it as both a healing practice and a form of meditation. Research by Cuneo et al. (2011) found that healthcare professionals who practised self-Reiki reported significant improvements in their own well-being, stress levels, and burnout symptoms.

To begin a basic self-Reiki session, find a quiet space where you will not be disturbed. Sit or lie comfortably and take several deep breaths to centre yourself. Place your hands gently over your eyes for 3 to 5 minutes, then move to the sides of your head, the back of your head, your throat, your heart, your solar plexus, your lower abdomen, and finally your knees or feet. At each position, breathe naturally and notice any sensations of warmth, tingling, or relaxation. There is no wrong way to do self-Reiki, as the energy will flow to wherever it is needed most.