What the corpus contains
5channel is a large-scale Japanese anonymous discussion board organised into topical boards, each containing threads, each thread containing sequentially numbered posts. The corpus we license is the public post record of that system, together with the structural metadata that gives it meaning.
Contents
- Public forum posts
- Post body text as submitted
- Complete thread structures
- Ordered post sequences within threads
- Reply and quotation relationships
- >>N anchor resolution into an explicit edge list
- Thread titles
- Thread title as submitted
- Board classification
- Board ID, name, and category
- Timestamps
- Post datetime, thread creation, last update
- Poster display name field
- As submitted; often default/anonymous
- Post identifiers
- Where present in the source record
- Thread lifecycle state
- Active, archived (過去ログ), capacity-closed
| Item | Notes |
|---|---|
| Public forum posts | Post body text as submitted |
| Complete thread structures | Ordered post sequences within threads |
| Reply and quotation relationships | >>N anchor resolution into an explicit edge list |
| Thread titles | Thread title as submitted |
| Board classification | Board ID, name, and category |
| Timestamps | Post datetime, thread creation, last update |
| Poster display name field | As submitted; often default/anonymous |
| Post identifiers | Where present in the source record |
| Thread lifecycle state | Active, archived (過去ログ), capacity-closed |
Linguistic characteristics
The corpus is dense in language forms that are scarce in formal or web-crawled Japanese text:
- — Informal spoken-register Japanese and dialect
- — Internet slang, board-specific vocabulary, and terminology that originated on 5channel and later entered general Japanese usage
- — Kaomoji, ASCII art, and non-standard orthography
- — Abbreviations, deliberate misspellings, and character substitution
- — Multi-party threaded exchange with explicit reply structure
- — Rapid diachronic change — the same phenomena tracked across two decades
Scale figures below are stated as ranges pending completion of a formal corpus inventory. Exact counts for any requested subset — board selection, date range, and filtering criteria — are provided with each sample and with every delivery manifest.
- Total posts
- {{TOTAL_POSTS_RANGE}} — TODO(business)
- Total threads
- {{TOTAL_THREADS_RANGE}} — TODO(business)
- Years covered
- {{YEARS_COVERED}} — TODO(business)
- Board count
- {{BOARD_COUNT_RANGE}} — TODO(business)
- Daily additions
- {{DAILY_ADDITIONS_RANGE}} — TODO(business)
- Uncompressed size
- {{UNCOMPRESSED_SIZE_RANGE}} — TODO(business)
| Item | Notes |
|---|---|
| Total posts | {{TOTAL_POSTS_RANGE}} — TODO(business) |
| Total threads | {{TOTAL_THREADS_RANGE}} — TODO(business) |
| Years covered | {{YEARS_COVERED}} — TODO(business) |
| Board count | {{BOARD_COUNT_RANGE}} — TODO(business) |
| Daily additions | {{DAILY_ADDITIONS_RANGE}} — TODO(business) |
| Uncompressed size | {{UNCOMPRESSED_SIZE_RANGE}} — TODO(business) |
Not included
- — Non-public content and any operator-internal records
- — Content removed under the site's own deletion and moderation processes at time of export
- — Attachments and externally hosted media (links are retained as text; the linked resources are not redistributed)
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