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Atmosphere and feature ratings above are based on Best Retreats research (November 2026). They will be updated if Ronin Sina submits its own information.

Ronin Sina: An In-Depth Review for Shipibo Ayahuasca and Plant Dietas near Pucallpa, Peru

Ronin Sina is a small Shipibo family center a few kilometers outside the Shipibo village of San Francisco, near Yarinacocha lagoon about 20 km from Pucallpa, directed by Maestro Sina and his son, Maestro Emilio, with no formal program and guests staying weeks to months for healing plant dietas, according to its Retreat Guru page. Operator text gives prices of about $300 to $400 a week with three or four ceremonies, food and lodging, and describes ceremonies in the traditional Shipibo way, where healing rests on the maestro’s icaros and guests need not drink. Against that, no reviews exist on any platform, there is no website, legal entity, medical screening, medical staff or emergency plan, operator text says only Spanish is spoken and refunds are not given, and no dated activity appears after 2021 to 2022.

🎯 At a Glance

• Locations: Near San Francisco, Yarinacocha district, Ucayali, Peru, per its listing; no address or GPS is published.
• Approach: Shipibo ayahuasca ceremonies with individual icaros, long healing plant dietas, plant baths and vapors; no yoga, entertainment or Western therapy.
• Suitable For: Independent, Spanish-speaking travelers wanting a traditional Shipibo dieta, after confirming the maestros, dates and an emergency plan. Not suitable for people taking antidepressants or with heart or psychiatric conditions.
• Costs: $300 a week with four ceremonies (Psychable, 2021); our earlier operator text gave $400 a week, $300 from week three and a $50 application fee. Transport from Pucallpa is about $18 each way and is extra. No refunds, per that text.
• Overall Assessment: A low-cost, Shipibo-owned family setting, offset by no published safety measures, no independent reviews, no way to confirm current operation and no refunds. Directory evaluation: C.

💬 What Guests Are Saying

The positive picture. No guest reviews exist on any platform.

The negative feedback. None published.

Who is writing the reviews. All available descriptions are written by the operator. If you have attended, we encourage you to share your experience through our submission form.

🚩 Incident Report

We searched review platforms and English and Spanish-language news for reports involving Ronin Sina, Maestro Sina, Maestro Emilio and the third maestro named in 2021, Uber.

• Deaths and serious injuries: None found involving this center.
• Sexual misconduct: No allegations found.
• Theft and fraud: None found.
• Legal action: None found.

The maestros’ surnames are not published, which limits name checks. In 2018 Shipibo healer Olivia Arévalo was killed in another Yarinacocha community and the suspect, a Canadian visitor, was lynched, as RPP reported; that case does not involve Ronin Sina. Our earlier profile found no incidents.

If you have experienced or witnessed an incident with this center, please report it confidentially.

🔍 Critical Notes

Screening and medical support. No medical questionnaire, contraindication list, medical staff, integration or emergency protocol is published, and the 2021 listing welcomes guests with “physical, mental, and emotional” concerns. Our earlier operator text described a video-call consultation with an external party before booking, the maestro deciding whether each guest drinks, and guests who keep asking for more ayahuasca eventually receiving it, at their own responsibility. San Francisco has a health post; Pucallpa is about 45 minutes by road, per a neighboring center.

Who runs it. Maestro Emilio’s bio says his father trained him and he has worked as a curandero for 15 years in Iquitos and Pucallpa. The 2021 listing adds a third maestro, Uber, and says the maestros’ wives cook. A “Maestro Sina (Emilio Ramirez),” age 73, guest-hosts at Feather Crown in Ecuador with a son named Gilmer; nothing confirms he is the same man. No Peruvian company or tax number (RUC) is published.

Status. Retreat Guru lists no dates, its BookRetreats page no longer shows a retreat, and the latest dated material is the 2021 listing. No closure has been announced.

Legal context. Ayahuasca is legal in Peru, where traditional use is national cultural heritage, but retreats are not formally regulated, according to ICEERS.

Corrections to our earlier profile. Retreat Guru shows no reviews, so praise for Maestro Sina’s icaros there is unverified, as are a Reddit note of $400 for two weeks, a Quora description of a “secure” family vibe and wishes for more integration guidance. Bar music is supported only by the operator’s own warning that a nearby village disco can be heard. The Shipibo family center near Pucallpa, Sina and Emilio, the no-frills setting, low prices and Shipibo ownership are confirmed by operator listings; Spanish-only service, no refunds and the $50 fee come only from operator text in our earlier profile.

🆘 Screening & Mental Health Risks

No screening or contraindications are published. ICEERS notes that ayahuasca’s MAOI component makes it dangerous with SSRIs and other serotonergic drugs and that it is contraindicated for people prone to psychosis. Never stop a psychiatric medication to qualify for a ceremony without your prescriber’s guidance.

🧪 Brew Substance

Shipibo ayahuasca, the maestros’ only psychoactive plant, per the operator. It combines the Banisteriopsis caapi vine with a DMT-containing leaf such as chacruna, as Erowid explains. Non-psychoactive dieta plants, baths and vapors are also used.

📍 Location, Setting & Style

• Setting: Shipibo land in the lowland forest near Yarinacocha, where only Shipibos may own property, per the operator.
• Rooms: A maloka, simple guest houses and a separate cabin for long dietas; expect insects.
• Style: Traditional Shipibo healing with icaros, little explanation and plain, repetitive food.

Practical guidance: Fly to Pucallpa and take a car to the center, about $18 each way.

Should You Book?

Only after confirming the maestros’ full names, that the center is operating, an emergency plan and the payment terms in writing, and if you can manage in Spanish. Read our guide to verifying retreat facilitators.

The Team & Story

“Ronin Sina” is said to mean “brave anaconda” in Shipibo. The family describes keeping a tradition in which most patients never drink ayahuasca and healing comes through the maestro’s songs. We did not independently verify anyone’s training.

Prep & Integration Tips

Before you go: Disclose every medication and condition in writing and plan any change with your own doctor. After you return: No integration is offered on site; arrange support from a qualified therapist at home. Our guide on how to research ayahuasca incidents can help you check any center.

Pros & Cons

Book Your Ceremony

Contact is through its Retreat Guru page. Best Retreats does not take bookings; learn more about our mission.

Last reviewed November 2026.

This article is for informational purposes only and is not medical advice. Consult a qualified medical professional.