Do old codes stop working when a prefix is retired?

No. Every serial already issued under a retired prefix identifies its release permanently. Retirement only means that no serial beyond the last issued number will ever exist.

How can you tell a retired prefix from a defunct company?

Look for a successor prefix. A label that rotated has a new prefix carrying similar branding and a serial starting near 001; a label that stopped has no successor and no new releases under any prefix.

Why do old titles get harder to find over time?

Catalogues prune inactive listings, licences lapse and storefronts close, so older releases drop out of the indexes that once carried them even though the codes remain valid.

Codes From Studios That No Longer Release

A discontinued code prefix keeps its entire back catalogue but receives no new serial numbers, which happens either because the label rotated to a successor prefix or because the company stopped releasing. Distinguishing the two cases determines whether a successor prefix exists to search instead.

A discontinued code prefix keeps its entire back catalogue but stops receiving new serial numbers. That happens for two quite different reasons: the label rotated to a successor prefix and is still active, or the label itself stopped releasing. Telling the two apart is the practical question, because only the first case gives you somewhere else to look.

Nothing about retirement invalidates existing codes. SSNI-500 identifies its release exactly as it did on the day it shipped. What retirement removes is the future — a serial above the last one issued under that prefix was never allocated and never will be.

What is the difference between a retired prefix and a closed studio?

A retired prefix has a successor; a closed studio does not.

	Retired prefix, active label	Label no longer releasing
New releases	Yes, under a new prefix	No
Back catalogue codes	Valid	Valid
Successor prefix exists	Yes	No
Catalogue listings	Maintained	Gradually pruned
Best search strategy	Search the successor line	Search archives and databases

The second column degrades over time in a way the first does not. An active label has commercial reasons to keep its back catalogue listed; a dormant one does not, so its titles quietly drop out of storefronts and survive mainly in databases and secondary listings.

Which prefixes were retired but replaced?

The largest labels have all rotated at least once, and in each case the successor is still receiving numbers.

Retired prefixes	Successor	Label	Successor opened
`SOE`, `SNIS`, `SSNI`, `SSIS`, `SONE`	`SNOS`	S1 No.1 Style	Nov 2025
`IPTD`, `IPZ`, `IPX`	`IPZZ`	IdeaPocket	Mar 2023
`MIDD`, `MIDE`, `MIDV`	`MIDA`	MOODYZ	Feb 2025
`ABP`, `ABW`	`ABF`	PRESTIGE	Jul 2023
`JUX`, `JUY`, `JUL`, `JUQ`	`JUR`	Madonna	Dec 2024
`JUFD`	`JUFE`	Fitch	Jan 2019
`KAWD`, `CAWD`	`CAWB`	kawaii*	Jul 2026
`EBOD`	`EBWH`	E-BODY	Jul 2023
`PPPD`	`PPPE`	OPPAI	Jan 2022
`DASD`, `DASS`	`DSOD`	Das!	Aug 2026
`MEYD`	`MFYD`	Tameike Goro	May 2025
`HND`	`HMN`	Honnaka	Jun 2021
`WANZ`	`WAAA`	Wanz Factory	Nov 2020
`RBD`	`RBK`	Attackers	Jan 2021
`STARS`	`START`	SOD Create	Mar 2024
`NHDTA`, `NHDTB`	`NHDTC`	Natural High	Jan 2025
`NSPS`	`NSFS`	Nagae Style	—
`DVDMS`	`DVMM`	Deep's	—
`FSDSS`	`FNS`	FALENO	—
`VENU`	`VENX`	Venus	—
`RCT`	`RCTD`	ROCKET	—

Dates are the month the successor's first serial shipped, taken from each label's own catalogue and from FANZA product records, checked 2026-08-03. A dash means we could not establish the month. HND → HMN and STARS → START are both genuine successions rather than parallel lines: HND-999 and HMN-001 carry the same release date, and START-001 shipped a month after STARS closed at 999, under the same label name.

Reading this table backwards is often the fastest way to recover from a failed lookup. If a serial under a retired prefix is out of range, the same performer, series or concept usually continues under the successor, and the successor's serial numbering restarted near 001.

Which prefixes have no successor?

Fewer than published lists claim. Every prefix in this group that we checked turned out to have a live continuation somewhere, which is worth knowing because these are exactly the ones commonly listed as dead labels.

Prefix	Label	What we found
`DV`	Alice Japan	The label's `DVAJ` line was still receiving numbers in mid-2026
`WANZ`	Wanz Factory	Reopened as `WAAA` in November 2020 and still active
`DVDES`	Deep's	Ran alongside `DVDMS`, which closed in 2022; Deep's now numbers `DVMM`
`RBD`	Attackers	Succeeded by `RBK`, which opened a month after `RBD` closed

We are deliberately cautious in this section. "The prefix stopped receiving numbers" is something you can observe from release listings, and it is all we claim above. "The company closed" is a corporate fact that requires a source, and English-language coverage of Japanese adult industry corporate changes is thin and frequently wrong. Where we could not confirm the second, we state only the first.

Why do older codes get harder to find over time?

Because catalogues prune, licences lapse, and storefronts close — while the code itself stays perfectly valid.

Four effects compound:

Storefront pruning. Inactive listings are removed to keep catalogues navigable, so the authoritative record disappears first.
Licence expiry. Distribution rights for older material lapse and are not always renewed, particularly for labels that no longer negotiate.
Format obsolescence. Titles released only on physical media, or in resolutions no longer offered, are the first to be dropped from digital catalogues.
Database drift. Secondary databases inherit gaps from the storefronts they scraped, so a gap in one propagates.

None of these make the code wrong. They make the index incomplete, which is a different failure and calls for a different response — see JAV code not found.

How do you search a code from a discontinued prefix?

Work outward from the code rather than reformulating it.

Confirm the serial is in range. A serial above the prefix's last issued number cannot exist. If you are guessing at a number, this is usually why.
Check the successor prefix using the table above and the studio code reference.
Search databases rather than storefronts. For dormant labels the catalogue record often outlives the sales listing.
Identify the performer instead of the title. A named performer's filmography is a more durable index than any single storefront.
Do not add suffixes. Old titles attract -C, -U and -4K variants in circulation, and none of them are indexed anywhere.

Step 4 is the one that reliably works when the others do not, because a performer's identity does not get pruned from a catalogue the way a listing does.

What do you do when the catalogue trail has gone cold entirely?

Match the face, since it is the identifier that survives delisting.

Discontinued material is precisely the case where text search runs out: the storefront is gone, the database entry is thin, and the file name has been rewritten several times. A frame still contains the one thing that has not changed. Our index encodes faces as 512-dimension ArcFace vectors and compares them across 241,792 indexed faces covering 2,333 named performers (our index, 2026-08 snapshot), at a 0.40 similarity threshold calibrated for video stills.

Boundary worth stating: older material is where our coverage is weakest. The index is built from what currently circulates on 106 sites, 2,246 of 2,333 representative images come from a single source, and a large portion of the faces we hold have no name attached to them at all. For a title from a long-dormant label, a confident match is the exception rather than the rule, and we would rather say that plainly than imply otherwise.