Is a JAV code the same thing as a title?

No. The code is a catalogue number assigned by the label; the title is the Japanese marketing text printed on the cover. One title can carry more than one code, and compilation discs reuse titles across codes.

Does the prefix tell you who is in the video?

No. A prefix identifies the label or series, not the performer. Some labels sign performers exclusively for a period, so a prefix can hint at a small pool of performers, but it never identifies one.

Are letters in a code case sensitive?

No. Codes are conventionally written in capitals, but catalogues, file names and search boxes treat SSIS-001, ssis-001 and SSIS001 as the same release.

What Is a JAV Code? Letters, Numbers and Suffixes Explained

A JAV code is the catalogue number a Japanese adult video label prints on a release — a letter prefix, a hyphen and a serial number, as in SSIS-001. The prefix identifies the label or series, and the number identifies the individual title inside that series.

A JAV code is the catalogue number a Japanese adult video label prints on a release — a letter prefix, a hyphen and a serial number, as in SSIS-001. The prefix identifies the label or series. The number identifies the individual title inside that series. Everything else you see attached to a code — an extra letter, a 4K, a -C — was added later by someone other than the label.

Codes exist because Japanese release titles are long, descriptive and frequently near-identical. A short alphanumeric key is what shops, rental stores, distributors and databases actually use to refer to a release without ambiguity, and it is the single most reliable thing to search with.

What does each part of a JAV code mean?

Each part answers a different question about the release.

Part	Example	What it identifies
Prefix (letters)	`SSIS`	The label or series that issued the release
Separator	`-`	Purely cosmetic; often dropped in file names
Serial number	`001`	Position within that prefix, usually sequential
Suffix (optional)	`-C`, `-U`, `-4K`	Added by resellers or uploaders, not by the label
Part letter (optional)	`-A`, `-B`	A file split into pieces, not a separate release

The prefix is the only part with meaning attached to an organisation. IPZZ belongs to IdeaPocket, ABF to PRESTIGE, SNOS to S1 No.1 Style, MIDA to MOODYZ, START to SOD Create and MFYD to Tameike Goro. Note that the last four replaced earlier lines — SONE, MIDV, STARS and MEYD respectively — which you will still meet constantly, because a retired prefix stays on every title ever released under it. A full lookup lives in our studio code reference.

The number is sequential within the prefix, but only loosely. Labels reserve blocks, skip numbers, and issue several titles on the same street date, so SSIS-500 is later than SSIS-100 but you cannot derive a date from it.

Why do studios use codes instead of titles?

Because Japanese adult video titles are not designed to be unique identifiers.

A cover title is a sentence — often a long one, frequently containing the performer's name, a genre phrase and a number of superlatives. Two releases from the same label in the same month can share most of that text. Retailers need a key that is short, printable on a spine, typable into a stock system, and guaranteed unique. That is the code.

The side effect is that the code became the lingua franca of the entire downstream ecosystem: subtitle groups, databases, forums and file names all index on it. If you know the code, you can find the release almost anywhere it exists. If you only know the title, you often cannot.

Where do you actually find the code on a release?

In four reliable places, in rough order of trustworthiness:

The cover art, usually bottom-right on the front or on the spine
The retailer's product page, listed as 品番 (hinban, "product number")
The video itself, burned into an opening or closing title card
The file name, if the file came from a source that preserves it

The first two are authoritative. The fourth is not — file names are rewritten by every hand a file passes through, which is where stray suffixes, site tags and mangled prefixes come from.

Do all Japanese adult videos have a code in this format?

No, and this trips up most searches that fail.

The LETTERS-NUMBERS pattern is the convention of established studio labels. Three large categories sit outside it:

Category	Numbering style	Example shape
Studio labels	Letter prefix + serial	`MIDV-123`
Amateur / planning series	Numeric site prefix + letters + serial	`259LUXU-1234`
Individual-seller platforms	Platform tag + long serial	`FC2-PPV-1234567`
Uncensored subscription sites	Date-based, no letters	`010124-001`

The date-based forms are the ones people most often mistake for broken codes. They are not broken — they simply encode a publication date instead of a series position. We cover each family separately in how uncensored releases are numbered and how amateur and planning-series codes work.

How should you type a code when you search?

Type the prefix and the number with a hyphen and nothing else: SSIS-001.

Three habits cause most avoidable misses:

Keeping the internal zero padding. Retail systems store the number padded to five digits (ssis00001). That form is real, but it is an internal content ID, not the printed code. Search the printed form first.
Carrying suffixes over. -C, -U, 4K, HD and site tags were added by redistributors. Strip them; search the bare code; add them back only if you specifically want that version.
Reading letters as digits. O and 0, I and 1, and S and 5 are confused constantly in codes copied from a screenshot.

If a clean, correctly typed code still returns nothing, the cause is usually one of a small set of structural reasons rather than a typo — see JAV code not found.

What can a code not tell you?

A code does not identify a performer, a release date, a resolution, or whether the copy you are holding is complete.

This is worth being blunt about, because a lot of secondary sites imply otherwise. The prefix tells you which label issued the release. It does not tell you who appears in it — labels issue hundreds of titles under one prefix with different casts. It does not encode a date, because numbering is sequential rather than chronological. And it says nothing about the file: 4K, HD and -C are all claims made by whoever renamed the file, verifiable only by watching it.

That gap is exactly why image-based lookup exists as a separate tool. A code answers "which release is this?" Our index answers a different question — "whose face is this?" — by comparing face vectors across 241,792 indexed faces and 2,333 named performers (our index, 2026-08 snapshot).

Boundary worth stating: our coverage is concentrated. Of the 106 sites in our index, only around a dozen carry Japanese-style codes at all, and 2,246 of 2,333 representative images come from a single source. It is a good tool for identifying a face and a poor substitute for a retailer's catalogue.