Overview
This page covers Saku Reiki as a named lineage within the Reiki family. The sources reviewed for this entry do not document its founder, history or teaching structure, so the page explains the broader Reiki family and the research on Reiki in general, and states where that evidence stops. Reiki is usually traced to early twentieth-century Japan, where Mikao Usui is credited with the Usui system. Claims made by individual schools are attributed to those schools here, not evaluated as established fact.
Where does Saku Reiki come from?
Reiki origins in early twentieth-century Japan
The Reiki family is usually traced to Japan in the early twentieth century. A 2015 Cochrane review of Reiki for depression and anxiety credits Mikao Usui with rediscovering the system in early 1900s Japan, and credits Chujiro Hayashi with opening the first Reiki clinic in Japan and standardizing the hand positions of the Usui system. The same review credits Hawayo Takata with opening the first Reiki clinic in the United States in 1970. The review also repeats the claim that Reiki is a 2500-year-old system. That antiquity claim is a tradition-level account that the sources reviewed here do not verify, and it is recorded as a claim rather than as a date.
The sources reviewed for this page do not establish the founding date, founder or lineage of Saku Reiki. Searches of PubMed and of the open web for the term returned no source that describes it, and the results were general Reiki material. The account of the Usui system in this section applies to the broader family. It should not be read as a history of Saku Reiki itself.
Training structure and transmission
Within the Usui system, training is described in levels. The Cochrane review states that Reiki training involves several levels, including 1, 2, 3 and 3A, and that Level 1 is generally for self-help or for treating family members only. These levels describe the Usui system. The review does not say whether other schools or lineages follow the same structure.
Other schools and lineages exist within the Reiki family, but the sources reviewed here do not describe their content, their teacher certification or their relationship to the Usui system. Anyone seeking the history of a specific lineage should ask the school directly and check whether its claims are documented in sources that can be opened.
What do the names and terms mean?
Reiki as an umbrella term
Reiki is used as an umbrella term for a family of practices. The Cochrane review describes Reiki as a vibrational or subtle energy therapy most commonly facilitated by light touch on or above the body. It describes the proposed mechanism as the transfer of energy by a practitioner acting as a channel. These are descriptions of how the practice is framed, not evidence that such energy exists.
Saku Reiki is the name used for one lineage within this family. Using the same word for two practices does not show that their methods, training or claims are the same. Findings from one Reiki lineage should therefore not be transferred to another without evidence for that lineage.
Energy framing and measurement
Energy concepts in Reiki fall outside what current physical measurement has established. The NCCIH states that there is no scientific evidence supporting the existence of the energy field thought to play a role in Reiki. This page therefore treats energy language as a practitioner framework rather than an established physical mechanism.
The Metaphysical category applied to Saku Reiki here reflects the energy-based framing that the cited sources describe for Reiki generally. It is not a verified claim about the lineage's own teaching. The category is a description of framing, and it does not indicate any effect.
What does Saku Reiki involve?
Session format described for Reiki
The Reiki sessions described in the reviewed literature involve a practitioner placing hands lightly on or just above a person. The Cochrane review describes a traditional Usui treatment as placing the hands on 12 positions in total, on the head and on the front and back of the torso. Hand placements in other lineages may differ, and the review does not describe them.
The trials and reviews examined by the sources reviewed describe heterogeneous intervention protocols, so session length and frequency varied across studies. The Cochrane review reports that the trials it examined identified participants by scale scores rather than clinical diagnoses. The sources reviewed do not give a standard protocol for Reiki, and this page does not offer one.
What the sources do not describe for Saku Reiki
The sources reviewed do not describe the session structure, intake process, symbols or training requirements of Saku Reiki. Practitioners of any lineage should be asked directly about their methods and qualifications. Claims about session content should be attributed to the school that makes them.
A person considering a session can ask what will happen, decline any part of it, and end a session at any time. These points apply to any Reiki treatment and are included as general care questions rather than as findings from a specific source.
What is Saku Reiki used for?
Conditions studied in trials
Reiki has been studied for pain, anxiety and depression. The NCCIH reports that most of that research has not been of high quality and that results have been inconsistent. The NCCIH page does not name specific studies. Its statement is that Reiki has not been clearly shown to be effective for any health-related purpose.
Practitioners and some researchers describe use in cancer symptom management, including fatigue and comfort. A 2026 systematic review of four studies in women with breast cancer reported that some included studies suggested improvements in fatigue and overall comfort, and its authors state that firm conclusions about effectiveness are not possible. A 2026 review of palliative settings found similar patterns, with certainty rated very low.
Reported reasons without strong evidence
People seek Reiki for relaxation, sleep, emotional well-being and a sense of comfort during illness. These reasons are reported by users and practitioners and are not established by controlled studies. The palliative settings review describes improvements in these areas in some studies, with inconsistent results across them.
The Cochrane review concluded that there is insufficient evidence to say whether Reiki is useful for people over 16 with anxiety or depression. No study of Saku Reiki specifically was found in the searches run for this page. Any claim about the lineage's effects is therefore a claim by its proponents unless a school provides a documented study, and it should be read as the school's own position.
What does the research show?
Trials and reviews of Reiki as a whole
The 2015 Cochrane review by Joyce and Herbison included three randomized trials that randomized 124 participants in total. Only 45 people with anxiety or depression at baseline were used in the review, and only as subgroups. The authors state that there is insufficient evidence to say whether Reiki is useful. They rate the evidence as moderate quality at best, and most trials showed high or unclear risk of bias.
A 2025 meta-analysis of 11 randomized trials with 661 participants aged 14 and older reported that Reiki was associated with improved quality of life compared with control (standardized mean difference 0.28, 95% confidence interval 0.01 to 0.56). Heterogeneity was substantial, with I-squared at 65.1 percent, and the article reports no GRADE or other certainty rating. The authors note that blinding was difficult in these trials and that some included studies found no significant psychological effect.
Reviews in specific populations
The 2026 breast cancer review included four studies with 339 participants from the United States, Turkey and India. Quality scores ranged from 5 to 9 on Joanna Briggs Institute tools. The authors cite small samples, limited blinding and reliance on self-report. One included study reported that sham Reiki also produced benefits, which suggests that non-specific factors may explain some effects.
The 2026 palliative settings review of nine studies with 415 participants rated certainty as very low for both symptom burden and quality of life, and reported that results were inconsistent. The authors note that four of the studies drew on the same pediatric service, and that caregiver samples may overlap. Small samples, heterogeneous designs and outcome measures, and reliance on subjective outcomes limit the review's conclusions.
Evidence specific to Saku Reiki
The searches run for this page did not identify a controlled study, case series or systematic review of Saku Reiki. The PubMed search for the term returned general Reiki records, and the web search returned no independent description of the lineage. The sources reviewed therefore cannot say whether this lineage differs from the Usui system in outcomes, safety or training.
Findings for Reiki as a whole, or for other lineages, should not be transferred to Saku Reiki. The mixed and low-certainty results in the trials and reviews above are the most accurate summary of the broader evidence that this page could locate.
What are the safety considerations?
Harms reported in the sources
The NCCIH page states that Reiki has not been shown to have any harmful effects. The breast cancer review reports that no serious adverse effects related to Reiki were reported in the included studies, and it describes Reiki as feasible and generally well tolerated.
The palliative settings review found that only one study monitored adverse events, and that this study reported one serious event potentially related to the intervention. The authors state that the absence of reported harms should not be interpreted as evidence of safety, and that harms were not a predefined outcome in the review. Serious harm data for Saku Reiki are not documented in the sources reviewed.
Care boundaries and questions to ask
Reiki is a complementary practice and does not replace diagnosis or treatment by a clinician. A person with a new, worsening or unexplained symptom should seek assessment from a qualified clinician rather than rely on an energy session. This is a conventional care boundary that applies whatever the lineage.
Questions a person can ask a practitioner include what the session involves, what training and certification the practitioner holds and from which school, whether the school's claims are documented, and how the practitioner will coordinate with the person's clinicians. No statutory regulation or training standard for Saku Reiki was found. The training levels in the Cochrane review describe the Usui system only.
Connected Entries
Showing 8 of 15 related records.
Classification and context
- Entry type
- Modality
- Practice type
- Reiki-family energy practice (light touch or distant)
- Traditions
- Reiki (Usui system), Japan, early twentieth century
- Concepts
- Light touch on or above the body, Practitioner as a channel for energy, Training levels in the Usui system, Subtle energy framing without verified physical mechanism
- Categories
- Complementary, Metaphysical
Sources and discovery context
Research and public-health sources support evidence and safety context. Directory and discovery sources describe navigation, relationships, practitioners, and access—not clinical efficacy.
A federal health information page summarizes Reiki research as limited in quality and inconsistent in results.
How this source relates
- Source link
- Exact source page
- Relationship
- Supports the statement that Reiki has not been clearly shown to be effective and that the energy field has no scientific support. Does not support any finding about Saku Reiki or any specific trial.
- Supports sections
- Practice Description, Research and Evidence, Safety and Suitability, Terminology, Claimed Uses
A Cochrane review finds insufficient evidence on Reiki for depression and anxiety and describes the trials as weak.
How this source relates
- Source link
- Exact source page
- Relationship
- Supports findings for three small trials on depression and anxiety, the Usui training levels and the Usui hand positions. Does not support any claim about Saku Reiki or about other conditions.
- Supports sections
- History and Origins, Terminology, Practice Description, Claimed Uses, Research and Evidence, Safety and Suitability
A 2025 meta-analysis reports a small pooled quality-of-life effect across randomized trials with substantial heterogeneity.
How this source relates
- Source link
- Exact source page
- Relationship
- Supports the pooled quality-of-life result across 11 trials and its heterogeneity. Does not support any clinical benefit claim, any condition-specific effect or any finding about Saku Reiki.
- Supports sections
- Research and Evidence
A 2026 systematic review of four small studies reports possible symptom benefits and no serious adverse effects in those studies.
How this source relates
- Source link
- Exact source page
- Relationship
- Supports the results of four small studies in women with breast cancer, the authors' limitations and their report of no serious adverse effects in those studies. Does not support any finding for other cancers, for palliative care or for Saku Reiki.
- Supports sections
- Practice Description, Claimed Uses, Research and Evidence, Safety and Suitability
A 2026 palliative settings review rates the certainty of Reiki findings as very low and notes that few studies monitored harms.
How this source relates
- Source link
- Exact source page
- Relationship
- Supports the very-low-certainty findings across nine studies in palliative and cancer settings, and the statement that harms were not a predefined outcome. Does not support any claim for Reiki in other settings or for Saku Reiki. Its findings also cover Therapeutic Touch.
- Supports sections
- Claimed Uses, Research and Evidence, Safety and Suitability
Links to Gyfts Saku Reiki page for this practice, for discovery only. The platform's descriptions and claims are not independent claims. Machipedia does not rely on them for evidence.
How this source relates
- Source link
- Exact source page
- Relationship
- Links to Gyfts' page for this practice, for discovery only. The platform's descriptions and claims are not independent evidence, and nothing on this Machipedia page relies on them.
- Supports sections
- Practice Description