Why does one studio have several prefixes?

Labels open a new prefix when a line is refreshed or moved to a new production standard, and let the old one stop receiving numbers. The back catalogue keeps its original codes permanently.

Is there an official list of prefixes?

No central registry exists. Every published list, including this one, is compiled from observed releases, which is why lists disagree at the edges and why uncertain entries should be marked rather than guessed.

Can two studios use the same prefix?

Near-collisions between small labels do occur, since nothing prevents them. Among the major labels the prefixes in this table are distinct, and collisions are mostly a problem with short two-letter prefixes.

JAV Studio Code Reference Table (Updated 2026)

Studio code prefixes map to the label that issued a release: SNOS and SONE to S1, IPZZ to IdeaPocket, MIDA to MOODYZ, ABF to PRESTIGE, START to SOD Create, MFYD to Tameike Goro. Labels rotate prefixes over time, so most studios own several — one current, the rest retired.

Studio code prefixes map to the label that issued a release. SNOS and SONE belong to S1 No.1 Style, IPZZ to IdeaPocket, MIDA to MOODYZ, ABF to PRESTIGE, START to SOD Create, and MFYD to Tameike Goro. Most labels own several prefixes — one currently receiving numbers, the rest retired but still valid for their back catalogue.

This page is organised by label, because that is how prefixes are actually allocated. If you have a prefix and want to look it up alphabetically instead, use the A–M and N–Z lookup tables, which cover the same material in prefix order.

How do you read this table?

Each row is a prefix; each group is a label; Status says whether that prefix is still receiving new numbers.

Current — new releases are still being numbered under this prefix
Retired — the back catalogue is intact, but no new numbers are issued
A blank status means we have not confirmed which, and we would rather say so

A retired prefix is not a dead code. SSNI-500 resolves exactly as well today as it did on release. What retirement means is that a serial beyond the last issued number will never exist, which is a common cause of a failed lookup — see codes from studios that no longer release.

Which prefixes belong to the major single-performer labels?

These are the labels whose lines are built around individually contracted performers, and they rotate prefixes most visibly.

Label	Prefix	Status
S1 No.1 Style	`SNOS`	Current
S1 No.1 Style	`SONE`	Retired
S1 No.1 Style	`SSIS`	Retired
S1 No.1 Style	`SSNI`	Retired
S1 No.1 Style	`SNIS`	Retired
S1 No.1 Style	`SOE`	Retired
S1 No.1 Style (compilations)	`OFJE`	Current
S1 No.1 Style (VR)	`SIVR`	Current
IdeaPocket	`IPZZ`	Current
IdeaPocket	`IPX`	Retired
IdeaPocket	`IPZ`	Retired
IdeaPocket	`IPTD`	Retired
IdeaPocket (compilations)	`IDBD`	Retired
MOODYZ	`MIDA`	Current
MOODYZ	`MIDV`	Retired
MOODYZ	`MIDE`	Retired
MOODYZ	`MIDD`	Retired
MOODYZ	`MIAB`	Current
MOODYZ	`MIAA`	Retired
MOODYZ	`MIFD`	Current
MOODYZ	`MIMK`	Current
MOODYZ (compilations)	`MIZD`	Current
PRESTIGE	`ABF`	Current
PRESTIGE	`ABW`	Retired
PRESTIGE	`ABP`	Retired
kawaii*	`CAWB`	Current
kawaii*	`CAWD`	Retired
kawaii*	`KAWD`	Retired
kawaii* (compilations)	`KWBD`	Current
FALENO	`FNS`	Current
FALENO	`FSDSS`	Retired

Attribution and status checked 2026-08-03 against each label's own release listing and against FANZA product records. Several of these rotated recently: SONE closed at 998 in November 2025 and S1's numbering continues under SNOS; MIDV closed at 999 in December 2024 and MOODYZ continues under MIDA; CAWD reached 999 in August 2026 with CAWB already running alongside it.

The pattern to notice: within a label, prefixes usually share letters with their predecessor (SSNI → SSIS, IPX → IPZZ, ABW → ABF). That similarity is deliberate branding and also a trap — a one-letter difference is a different line, not a variant of the same release.

Which prefixes belong to the married-woman and mature labels?

This group is unusually stable, and several of these prefixes have run for a long time without rotation.

Label	Prefix	Status
Madonna	`JUR`	Current
Madonna	`JUQ`	Retired
Madonna	`JUL`	Retired
Madonna	`JUY`	Retired
Madonna	`JUX`	Retired
Madonna (MONROE line)	`ROE`	Current
Madonna	`URE`	Current
Fitch	`JUFE`	Current
Fitch	`JUFD`	Retired
Tameike Goro	`MFYD`	Current
Tameike Goro	`MEYD`	Retired
Venus	`VENX`	Current
Venus	`VENU`	Retired
Nagae Style	`NSFS`	Current
Nagae Style	`NSPS`	Retired
Premium	`PRED`	Current

Checked 2026-08-03. URE and ROE are the two most often mis-filed: both are Madonna, listed on Madonna's own catalogue and carrying Madonna as the maker in FANZA's records, with ROE running as the label's MONROE line. Both were still receiving numbers in mid-2026.

The JU- family is worth memorising as a group. Seven of the prefixes above start with JU, split across two labels, which is the most common source of mis-attribution in published prefix lists.

Which prefixes belong to the drama and specialist labels?

Label	Prefix	Status
Attackers	`ADN`	Current
Attackers	`ATID`	Current
Attackers	`RBK`	Current
Attackers	`JBD`	Current
Attackers	`SHKD`	Retired
Attackers	`RBD`	Retired
Attackers	`SSPD`
E-BODY	`EBWH`	Current
E-BODY	`EBOD`	Retired
OPPAI	`PPPE`	Current
OPPAI	`PPPD`	Retired
Das!	`DSOD`	Current
Das!	`DASS`	Retired
Das!	`DASD`	Retired
Honnaka	`HMN`	Current
Honnaka	`HND`	Retired
Deep's	`DVMM`	Current
Deep's	`DVDMS`	Retired
Deep's	`DVDES`	Retired
Natural High	`NHDTC`	Current
Natural High	`NHDTB`	Retired
Natural High	`NHDTA`	Retired
ROCKET	`RCTD`	Current
ROCKET	`RCT`	Retired

Checked 2026-08-03. HMN is Honnaka's: it sits on Honnaka's own catalogue and picks up exactly where HND stopped — HND-999 and HMN-001 carry the same release date in June 2021. SSPD is an Attackers prefix, but we could not establish whether it is still receiving numbers, so its status stays blank.

Which prefixes belong to SOD?

SOD Create runs several parallel lines rather than one rotating line, so its prefixes coexist instead of succeeding one another.

Line character	Prefix	Status
Performer-led line (SOD star)	`START`	Current
Performer-led line, earlier	`STARS`	Retired
Planning line	`SDMUA`	Current
Planning line, earlier	`SDMU`	Retired
Youth-themed line	`SDAB`	Current
SENZ line	`SDDE`	Current
SOD female employees	`SDJS`	Current
Married-woman debut line	`SDNM`	Current
Magic Mirror van line	`SDMM`	Current

Checked 2026-08-03 against SOD's own new-release listing and FANZA product records. START is a straight succession rather than a parallel line: STARS closed at 999 in February 2024 and START-001 shipped the following month under the same SOD star label.

The SD cluster is large and internally differentiated by concept rather than by era, which is why several SD prefixes are active simultaneously.

Where can you read more about an individual label?

Several of the labels above have their own write-up covering house style and line history rather than just the prefix list: S1 No.1 Style, IdeaPocket, MOODYZ, PRESTIGE, SOD Create, Madonna, Attackers, kawaii* and E-BODY.

Use those when you already know the label and want context. Use this page when you have a prefix and need to know whose it is.

Which prefixes are we deliberately not listing?

Prefixes we cannot attribute with confidence, and per-prefix release counts.

Two omissions are intentional:

Uncertain attributions. Published prefix lists circulate widely and copy each other, including their errors. Where we could not confirm which label owns a prefix, the row is absent or carries a visible verification marker rather than a plausible guess. A wrong attribution in a reference table propagates.

Release counts. You will sometimes see tables claiming "this label has released N titles". We will not publish that number, because we cannot measure it. Our index stores faces, not catalogue records — there is no maker field and no release date in it. What we could measure is how many titles carrying a given prefix appear on the sites we index, and that is a measure of aggregator coverage, not of studio output.

Boundary worth stating: our index spans 106 sites, but only around a dozen of them carry Japanese-style codes at all, and 2,246 of our 2,333 representative images come from a single source (our index, 2026-08 snapshot). Any per-prefix count derived from that would say more about one aggregator's catalogue than about any studio.

What should you do with a prefix that is not in this table?

Work out which numbering family it belongs to before assuming it is a studio prefix.

Check the alphabetical lookups — A–M and N–Z include prefixes not grouped here
Check the shape. Leading digits mean an amateur or planning series (259LUXU-1234); a date-shaped number means an uncensored subscription site; FC2-PPV- means an individual-seller platform
Check the serial length. Four or five digits under an unfamiliar prefix points to a long-running series rather than a studio line
Check for a padded internal ID. 1sdab00123 contains SDAB-123

If the prefix survives all four checks and still resolves nowhere, it is likely either a very small label or a transcription error — the character-confusion table in JAV code not found covers the second case.