JAV Codes Explained: How Japanese AV Product Numbers Work

If you spend any time around Japanese adult releases, you run into codes almost immediately — strings like SSIS-123, SONE-456 or JUQ-789, printed on packaging and used as the primary label on catalog listings. They are product identifiers: the number a publisher assigns to a release so it can be stocked, listed and searched.

They are genuinely useful, and most English-language explanations of them are wrong in the same two ways. This guide covers what a code is, what you can actually infer from each part of it, and — the part usually skipped — how to tell whether the identifier in front of you is the product code at all.

What Is a JAV Code?

In Japanese it is a 品番 (hinban), usually rendered as “product number” or “catalog number.” You will also see 商品番号 and 作品番号 used loosely in the same sense. There is no single official English term, and the practical meaning is the one that matters: it is the identifier the publisher assigns to a specific release.

That makes it a cataloging tool, not a description. The code does not tell you the genre, and it is not a rating or a classification. If you are still working out the vocabulary around all this, our guide to what JAV actually stands for covers the terminology side.

One piece of context worth having: Japan does operate a formal catalog-number standard for commercial recorded media — RIS502, administered by the Recording Industry Association of Japan, under which the company portion of a code is issued by the association rather than chosen freely by the publisher. That standard is why mainstream Japanese CDs and DVDs carry such consistent-looking numbers. The codes on adult releases do not behave that way, and that difference is the single most useful thing to understand here.

How to Read a JAV Product Code

The common shape is PREFIX–NUMBER:

Formatting varies in practice. Prefix length is not fixed, the number of digits differs between publishers, and listings do not always write the hyphen. Treat PREFIX–NUMBER as the shape you will usually see rather than a specification every publisher follows.

What the Prefix Really Tells You

Here is the first common error: “the letters are the studio” is not reliably true. A prefix identifies a label or a product line. A label may be an independent maker, an in-house brand inside a larger company, a line that was once run by an outside production company, or — in some cases — not a label at all.

Japanese reference material on individual labels makes the pattern clear. S1 NO.1 STYLE, one of the most recognisable names in the category, is described as an in-house label of the company WILL, launched as an in-house brand following MOODYZ. Madonna is documented as a label established in 2003 within the Hokuto (Outvision) group. IdeaPocket began as a label under Attackers and became an in-house maker under the same group from 2002.

So several unrelated-looking prefixes can sit inside one corporate group, a prefix can belong to a label that later became independent, and the corporate relationship can change without the code changing at all.

The examples below are drawn from Japanese-language reference material on each label. They are illustrations of how prefixes behave, not a lookup list.

What the Number Tells You

The digits give a position inside one prefix’s run. Within a single prefix, a higher number is generally a later release — JUQ-300 came after JUQ-100. That is a common pattern and a useful one, but it is a pattern, not a guaranteed rule.

Across different prefixes it tells you nothing at all. The Madonna sequence above shows why: when a prefix is retired the next one starts from a low number, so a JUR release from 2024 carries a far smaller figure than a JUL release from 2021. Comparing numbers between two prefixes is meaningless, and comparing them between two publishers is more meaningless still, because the runs are unrelated.

Two more limits. Gaps in a run are normal and do not imply a missing or withheld release. And the number reflects catalog position, not filming order — if you need an actual release date, read it from the listing rather than inferring it from the code.

Product Code vs Other Numbers You May See

This is the part most guides skip, and it is the one that causes the most confusion. Several different identifiers attach to the same release, and only one of them is the publisher’s product code.

Is an IPPA Number a JAV Product Code?

Short answer: whatever you have seen described that way, it is not the publisher’s product code, and we are not going to tell you how to read it.

Japan’s adult industry has a self-regulatory layer. The body now operating as the CCBU — previously known as IPPA — states on its own site that it builds industry rules, works with review organisations, excludes anti-social actors, issues registration certificates and handles anti-piracy and performer-health work. In terms of what appears on a release, it describes issuing marks and on-screen telops certifying that a title was produced and reviewed under those rules.

What the official source does not document is a public numbering scheme that outsiders can decode. Plenty of third-party sites publish interpretations of such numbers. We could not verify any of them against the organisation’s own material, so this guide does not reproduce them.

The takeaway that actually helps: not every alphanumeric string visible on a video is the product code. Review markings, distributor overlays and encoder tags all look plausible. The product code is the one that appears on the publisher’s own listing.

Why One Title May Appear With Different Identifiers

Restricting this to mechanisms visible in the reference material, rather than guessing from filenames:

• Different product types from the same maker. IdeaPocket’s IDBD prefix is recorded as being used for sell-through product, separately from its standard label prefixes. One publisher, parallel prefixes, different distribution products.
• Event entries. AVGL and AVOP are recorded as prefixes used for industry-event entries rather than a standing label, so a title entered in one can carry an identifier that does not match its usual line.
• A label changing hands. Fitch published under JUFD as a label under Madonna, then became an independent maker. A catalog that moves between publishers does not necessarily keep one continuous identifier scheme.
• Storefront records. A platform may hold its own internal identifier alongside the publisher’s. We did not verify how any specific storefront forms these, so treat a code copied out of a URL with caution.

What we are deliberately not doing is explaining suffixes. You will see trailing characters attached to codes online, and we could not verify which of them, if any, originate with publishers. Where origin cannot be confirmed, the honest answer is that it is unconfirmed.

How to Search for a JAV Title by Code

A product code is a precise, unambiguous search term, which is exactly what makes it attractive to people running low-quality sites. Searching a bare code in a general search engine is one of the most reliable ways to land on a page built to capture that specific query — we have covered how to spot fake JAV streaming sites separately, because this is the route most people arrive by.

A workflow that avoids that:

1. Copy the code exactly, preserving every letter and digit.
2. Keep the prefix and the number together, and do not drop leading zeros.
3. Search inside an official catalog or a licensed service you already have access to, rather than in a general search engine.
4. Confirm the result against the label, performer and release date shown on that listing — a matching code with no publisher details attached is describing a file, not a release.
5. Use general web search only to identify a code you cannot place, never as the place you actually go to watch.

For which official catalogs are searchable from outside Japan, our comparison of JAV streaming sites is the place to start, and how access and sign-up work from abroad covers the practical conditions.

Common Mistakes When Reading JAV Codes

• Assuming the prefix is the parent studio. It identifies a label. The company behind that label may be a group parent, and may have changed.
• Comparing numbers across prefixes. A new prefix restarts the count, so the newer release often has the smaller number.
• Treating every on-screen number as the product code. Review markings and overlays are not catalog identifiers.
• Assuming filename suffixes are official. If it is not on the publisher’s listing, it was added downstream.
• Reading the code as a genre. It identifies a release; it describes nothing about the content.
• Trusting a prefix list as permanent. Every list in circulation is a snapshot compiled by someone, and prefixes are retired regularly.

JAV Codes vs Genres vs Studios

Three different systems that beginners routinely collapse into one:

• Codes identify and catalog a specific release. One release, one publisher product number.
• Genres and categories describe content, and are applied by catalogs rather than encoded in the product number. Our guide to reading Japanese adult categories covers how those labels actually work.
• Studios and labels produce and publish. A label is what the prefix points at; the company behind it is a separate question.

If you are early enough that all three are new, our beginner’s guide to Japanese AV sets out the wider picture first.

Beginner FAQ

What does a JAV code mean?

It is a product number assigned by the publisher. The letters identify a label or product line and the digits give a position within that prefix’s numbering run.

Does the prefix always identify the studio?

No. It identifies a label. For an independent maker those amount to the same thing, but many labels sit inside a larger company, and some have changed owner — so the prefix is not a reliable guide to which company published a release.

Does a higher number mean a newer title?

Within the same prefix, usually. Across different prefixes, no — a retired prefix is replaced by one starting from a low number, so the newer release can carry the smaller figure.

Why do older and newer titles from one label use different prefixes?

Because prefixes get retired and replaced when a run grows long or a label is restructured. Madonna, for example, is documented as having moved through JUKD, JUC, JUX, JUY, JUL, JUQ and JUR since 2003. The label is continuous; the code is not.

Is an IPPA number the same as a JAV code?

No. The relevant industry body describes issuing review marks and on-screen telops, not a public catalog identifier. We could not verify any third-party interpretation of such numbering against official material, so we do not reproduce one.

Can one release have more than one identifier?

Yes. A publisher may run parallel prefixes for different product types, event entries can carry their own prefix, and storefronts keep internal records of their own. The publisher’s listing is the version to trust.

Is there an official master list of every prefix?

Not a single public one. Prefixes are assigned by individual publishers and change over time, so every list in circulation is compiled by a third party. Useful as a starting point, not as an authority.

The Short Version

A JAV code is a catalog identifier, not a genre description and not a universal studio code. Read the prefix as a label rather than a company, read the number as a position inside that one prefix’s run and nothing more, and check whether the string in front of you is the publisher’s product code at all before relying on it. Used that way, it does the one job it is genuinely good at: naming one specific release without ambiguity — which makes Japanese catalogs far easier to navigate than long, inconsistently translated titles ever will.