Editorial Policy
How Project Torii researches, reviews and recommends
Our goal is to help travelers make decisions they can understand. We separate verified product information, independent evidence and local context, explain important limitations, and recommend by travel fit rather than declaring one universal winner.
Evidence first · Best fit, not universal rankings · Corrections welcomed
Last updated: August 30, 2026
Our standard
The reader comes before the click
Project Torii is an independent Japan travel guidance site. We are not a mobile carrier, eSIM provider, travel agency or official representative of the services we cover. Our role is to explain the available choices, the evidence behind them and the situations in which a different option may be better.
Editorial independence
The conclusion is based on traveler fit
Commercial relationships, commission rates and the availability of an affiliate program do not determine our conclusions or comparison order.
Scope and limits
A useful guide is clear about uncertainty
Prices, plans, networks, fair-use rules and availability can change. We state relevant limitations and ask readers to confirm current provider terms before buying.
The Trust Test
Would we reach the same conclusion if the commission were zero?
If the answer is no, the recommendation should not be published.
Evidence framework
Six evidence layers, kept separate
Different sources answer different questions. We do not treat a provider claim, an independent study and a personal observation as if they carry the same meaning.
Official information
Provider websites, pricing pages, help centers and terms are the primary sources for product specifications and rules.
Independent evidence
Third-party research, network reports and comparable tests can add context, but we distinguish them from provider claims.
Local experience
Observations from Japan help explain practical situations. They are labeled as experience, not presented as controlled nationwide evidence.
Real-world practicality
We consider how a choice affects maps, translation, reservations, station exits, hotel details, hotspot use and communication during a trip.
Price
We note the relevant currency, region, promotion and check date because displayed prices may vary or change.
Limitations
Fair-use policies, speed restrictions, tethering rules, device compatibility and network variation are part of the decision, not footnotes to hide.
Review process
From traveler question to published guidance
1. Define the actual decision
We begin with the traveler’s situation: trip length, destination, devices, data use, comfort with setup and tolerance for limitations.
2. Verify current product facts
We check official sources for plan structure, price, validity, data allowance, tethering, fair-use terms, compatibility and support information.
3. Add independent and local context
Where useful and available, we review independent evidence and add clearly labeled observations from real travel situations in Japan.
4. Compare fit and exceptions
We identify who each option may suit, who may be better served elsewhere, and which tradeoffs could change the decision.
5. Audit the language and evidence
Before publication, we check that conclusions match the evidence, important caveats are visible, links work and English wording does not overstate certainty.
6. Publish with a check date
Time-sensitive facts receive a review or verification date. We update material changes and avoid implying that an older check guarantees current conditions.
Travel Match
We recommend by fit, not a universal winner
Travel services are rarely best for everyone. A short solo trip, a family sharing several devices and a heavy-data traveler may reasonably need different solutions.
Our reviews therefore emphasize Good fit for, Not for you and the practical conditions that may change the answer. A score or comparison result is a decision aid based on stated criteria, not a permanent or universal ranking.
When the evidence does not support a confident conclusion, we say so rather than filling the gap with an assumption.
Testing and claims
What we test — and what we do not claim
When we test something ourselves
We identify what was tested, the relevant location or conditions, and the limits of that observation. A personal result is not presented as proof of nationwide performance.
When we rely on published sources
We say what the source can establish and avoid implying first-hand testing that did not occur. Provider specifications remain provider claims unless independently verified.
Network and coverage guardrail
Results for an underlying Japanese carrier do not automatically prove the same performance for every travel eSIM using that network. Routing, priority, congestion, device and location can all matter.
Free access and samples
If a provider supplies free access, a sample, a discount or sponsorship, we disclose that material connection. It does not guarantee positive coverage.
Commercial transparency
Commission does not set the conclusion
Project Torii may earn a commission if a reader buys through certain links, at no extra cost to the reader. This relationship does not determine our recommendations or how we compare services.
- Affiliate relationships are disclosed before the first commercial call to action.
- Affiliate links are identified and use the appropriate link attributes.
- Services without an affiliate program may still be recommended when they fit the traveler better.
- Commission rates do not decide comparison order or create a universal winner.
Updates and corrections
Travel information changes, so our work continues
Dates have specific meanings
Published is the original publication date. Updated indicates a meaningful revision. A fact-check or source-review date refers only to the information reviewed at that time.
Material errors are corrected
When we confirm a material error, we correct it as promptly as practical. Significant changes may be explained in the article so readers can understand what changed.
If you believe something is inaccurate, outdated or unclear, please include the page URL, the statement in question and any supporting source when you contact Project Torii.
AI and editorial responsibility
AI can assist the workflow, not replace evidence
Project Torii may use AI tools to assist with outlining, drafting, translation, consistency checks and quality assurance. AI output is not treated as an authoritative source. Factual claims should be checked against relevant source material, and Project Torii remains responsible for the published conclusion.
We do not use AI-generated certainty to fill an evidence gap. If a material fact cannot be verified, it should be qualified, omitted or clearly identified as uncertain.
Hold us to the standard
See something we should review?
Corrections and well-supported challenges improve the site. Send us the relevant page and source so we can review the issue.