What Is Reiki? A Complete Guide

Energy Healing

You may have seen it offered at a wellness centre, a spa or a clinic: Reiki, a gentle healing practice in which a practitioner rests their hands lightly on or near the body, and a deep calm settles over the room. It is one of the best known of all the energy-healing traditions, and also one of the most gently misunderstood.

“Just for today, do not worry; just for today, do not anger.”
Mikao Usui, the Reiki Principles

So what is Reiki, where does it come from, what happens in a session, and what does the evidence actually say? This guide offers an honest, complete answer.

What Is Reiki?

Reiki is a Japanese healing practice based on the idea of a universal life-energy. Its name joins two Japanese words: rei, meaning universal or spiritual, and ki, meaning life-energy, the same concept as the Chinese qi or the Sanskrit prana.

In a Reiki session, a trained practitioner gently places their hands on or just above a fully clothed person, with the intention of encouraging relaxation and, in the tradition’s understanding, supporting the natural flow of this life-energy. Whatever one makes of that idea, the experience itself is almost always described the same way: profoundly, restfully calm.

It helps to hold Reiki with both openness and honesty. As a tradition, it is a meaningful spiritual practice that many find deeply nourishing. As an experience, it is a gentle, drug-free way to relax and feel cared for. We will honour the first while being clear-eyed about the second, including what the science does, and does not, show.

Where Reiki Comes From

Reiki as we know it was founded in Japan in 1922 by Mikao Usui, who is said to have developed the practice following a period of meditation and fasting on Mount Kurama, near Kyoto. Usui established a school and clinic in Tokyo, and the system he taught became known as Usui Reiki Ryoho.

In the decades that followed, Reiki travelled west, carried in particular by Hawayo Takata, a Japanese-American teacher who brought it to Hawaii and the wider world in the mid-twentieth century. From there it spread widely, and today it is practised across the globe. We tell the fuller story in our history of Reiki.

What Happens in a Reiki Session

A Reiki session is a calm and simple affair. You remain fully clothed, lying comfortably on a treatment couch or sitting in a chair, often with soft music playing and the lights low. The practitioner places their hands gently on, or just above, a series of positions across the body, resting at each for a few minutes.

There is usually little or no talking; many people drift into a dreamy, half-asleep state, and some feel warmth, tingling or a deep wave of relaxation. A typical session lasts around an hour, and most people leave feeling notably calmer and lighter. We describe it more fully in our guide to what to expect in a Reiki session.

The Five Reiki Principles

At the heart of Reiki is not only a healing method but a gentle philosophy for living, set out by Usui in five simple principles, often recited each morning:

Just for today, I will not be angry.
Just for today, I will not worry.
Just for today, I will be grateful.
Just for today, I will do my work honestly.
Just for today, I will be kind to every living thing.

Held lightly, day by day, these are a quietly beautiful guide to a calmer, kinder life, whether or not one ever receives Reiki at all. We explore them in our guide to the Five Reiki Principles.

How Reiki Is Said to Work

In the tradition’s own terms, Reiki works by channelling universal life-energy through the practitioner’s hands to the person receiving it, encouraging that energy to flow where it is most needed and easing places where it is felt to be blocked or depleted. Practitioners often describe themselves not as the source of the healing but as a channel for it.

This is the traditional, spiritual understanding of the practice, and it is worth meeting it on its own terms, while also being honest that the existence of such an energy has not been demonstrated scientifically.

What the Science Says

Reiki is gentle and widely considered safe, but what does the evidence show? Here, honesty matters most. Reiki has been studied in well over a hundred trials, yet most are small and preliminary, and the medical community remains, on the whole, unconvinced. The picture is genuinely mixed. Several reviews suggest Reiki can modestly ease stress, anxiety and pain and improve overall wellbeing, and a few have found it outperforming a placebo for some of these; other, more rigorous reviews have concluded that the evidence so far is simply insufficient to call Reiki an effective treatment for any specific condition.

What is clearer is that Reiki is deeply relaxing, and much of its benefit may flow from that alone: the calm setting, the still and unhurried hour, the comfort of attentive, caring touch. There is no good evidence that Reiki treats or cures disease, and no scientific demonstration of a transferable life-energy. None of this need diminish what people genuinely feel. Whether the calm arises from ki flowing, or simply from deep rest and human kindness, the relaxation is real, and valuable in itself.

So the honest bottom line is this: Reiki is best understood as a complementary practice for relaxation and comfort, not as a medical treatment. It can sit beautifully alongside conventional care, but it should never replace it. If you are unwell, please see a doctor, and let Reiki be one gentle support among others. We look at the research more closely in the science of Reiki.

The Benefits People Find

Set in that honest frame, the gifts people take from Reiki are real and worth naming: deep relaxation and relief from stress, a softening of anxiety, a sense of emotional release and comfort, better rest, and the simple, restorative experience of being cared for with full attention.

For many, especially those moving through illness, grief or exhaustion, it offers a precious hour of peace alongside whatever other care they are receiving. We gather these in our guide to the benefits of Reiki.

Reiki and the Chakras

Reiki and the chakra system share the same underlying idea of a subtle, energetic body, and many practitioners work with the chakras during a session, resting their hands over each centre in turn. If you would like to understand that side more deeply, our complete guide to the chakras is a natural companion to this one.

Can Anyone Learn Reiki?

Yes. Reiki is traditionally taught in levels, beginning with the first degree, which lets you offer Reiki to yourself and others, through the second degree, which introduces the Reiki symbols and distance practice, to the master level for those who wish to teach. Learning happens through classes with a teacher, including an “attunement” ritual said to open the student to the energy.

One of Reiki’s gentlest gifts is self-Reiki, the simple practice of resting your own hands on yourself for a few quiet, calming minutes. We cover both in our guides to the Reiki levels and to Reiki for self-healing.

Listen: Music for Reiki

Sound and Reiki belong together; soft, spacious music helps create the calm, heart-centred atmosphere a session depends on. Our Reiki Relaxation album was composed with the whole treatment in mind, its gentle pieces marking the unhurried rhythm of the practice. Whether you are a practitioner setting the tone for a session, or simply wish to rest in its stillness, press play and let the sound carry you.

Reiki, in the end, is a quiet invitation: to lie still for an hour, to be cared for, and to let the body and mind soften into rest. Held honestly, neither dismissed nor oversold, it offers something genuinely valuable in a restless world, a gentle, peaceful space in which to simply be. Whatever you believe about the energy said to flow within it, the calm it leaves behind is real, and yours to keep.