English-language overview
This page provides a concise overview of ILLMIA JAPAN, its public documents, clearance classes, and educational activities.
The Japanese version is the official source of public information. This English page is provided as a general guide. If the wording differs, please refer to the corresponding Japanese page and document.
1. About ILLMIA JAPAN
ILLMIA JAPAN is an independent research and survey organization that observes, records, and evaluates indeterminate and boundary areas. It is not itself a government agency. Its work may be conducted in cooperation with relevant public bodies, educational institutions, research organizations, and private-sector organizations.
ILLMIA JAPAN does not begin from the assumption that an unknown area should be developed, conquered, or permanently closed. It gathers the information required to judge whether, and at what distance, people should engage with an area.
2. Mission and principles
- Observe before drawing conclusions.
- Separate confirmed facts from interpretation and unresolved questions.
- Do not confuse the absence of a confirmed hazard with proof of safety.
- Prioritize safe return, accurate records, and team verification.
- Publish information only within the limits permitted by safety and review.
“Not every boundary is meant to be crossed.”
3. Public documents
The current public archive contains documents classified as PUBLIC. A PUBLIC REPORT summarizes confirmed observations and unresolved matters concerning an area, structure, object, or environment. A PUBLIC NOTICE provides instructions on public areas, visits, education, safety, or document use.
| Document | Available information |
|---|---|
| PUBLIC REPORT 002 | Initial observation record for Indeterminate Area A-002, commonly referred to as the Forest Hangar. Clearance Class 1-B. |
| PUBLIC REPORT 001 | Initial observation record for Indeterminate Area A-001, commonly referred to as the Underground Railway Section. Clearance Class 1-B. |
| PUBLIC NOTICE 001 | Instructions for participants in public visits and educational programs. Applicable to a Class 0 public visit area. |
4. Clearance classes overview
Clearance classes are provisional operational assessments based on observed phenomena, return conditions, environmental stability, and physical or cognitive effects. A lower class does not guarantee safety.
| Class | General meaning |
|---|---|
| Class 0 | Public visit area under continuing safety management. |
| Class 1-A | Low-risk area with comparatively stable observation routes. |
| Class 1-B | Low-risk area with unresolved elements; team movement and non-contact observation are required. |
| Class 2 | Caution area with route, communication, physical, or cognitive effects. |
| Class 3 | Hazardous area with difficult return, spatial change, or recorded missing-person incidents. |
| Class 4 | High-risk area with possible fatal, severe, or irreversible effects. |
| Class 5 | Restricted area; routine survey and entry are prohibited. |
5. Visits and education
Educational programs are conducted only in designated Class 0 public visit areas. The purpose is not exploration or entertainment. Participants learn how to observe an unknown environment, record facts separately from assumptions, maintain an appropriate distance, and report changes in condition.
Programs are currently described primarily for schools and other educational organizations. Detailed application arrangements and safety instructions are provided in Japanese.
6. Contact and language notice
Public contact details and individual English-language assistance are not currently listed on this website. Please use only contact methods formally published on the relevant Japanese page or document.
Document titles, classification terms, dates, and operational wording in Japanese remain authoritative. This overview should not be used to make an entry, safety, or access decision without checking the original Japanese information.