Japanese adult video genre labels look chaotic because people read them as one flat list. They are not. They come from four independent axes, and a single release usually carries one label from each.
Once you separate the axes, a listing that seemed to contain six unrelated categories turns out to contain one subject label, one appearance tag, one production format and one distribution status — each answering a different question.
What are the four axes a genre label can belong to?
They are subject, setting, production format and release format. Each is assigned by a different part of the supply chain, which is why they do not conflict with one another.
| Axis | Question it answers | Assigned by | Typical labels |
|---|---|---|---|
| Subject | Who is the lead, in genre terms? | Studio marketing | hitozuma, shirouto, jukujo, chijo |
| Setting | Where and in what premise? | Studio marketing | seifuku, OL, cosplay, onsen |
| Production format | How was it commissioned? | Studio contracts | tanpin, kikaku, senzoku |
| Release format | What are you buying? | Distributor | BEST, soshuhen, VR, dokusen |
The practical consequence: "hitozuma kikaku" is not a contradiction. The first word is the genre shelf, the second is how the shoot was commissioned.
What do the subject labels actually claim?
They claim a marketing position, not a biographical fact. This is the single most common misreading among English-speaking newcomers.
A subject label tells you the archetype the title was sold as. Hitozuma signals a domestic-setting release with an adult woman as lead; it is not a records check on anyone's marital status. Shirouto signals a non-professional presentation style — handheld framing, unscripted delivery, a street-cast premise — not an employment status. Jukujo signals an older marketing band with no fixed cutoff year.
Read them as answers to "which shelf?" and they become reliable. Read them as answers to "who is this person?" and they will mislead you every time.
Which genres are the largest by volume?
Volume is hard to state honestly, because what any index can count is exposure rather than production. What we can say about our own data is that the subject labels above dominate the tag distribution, while niche setting tags form a long tail of small categories.
Boundary worth stating: our index draws on a limited set of sources and a large share of representative images comes from a single site, so any count we produce reflects how visible a genre is in that sample, not how much of it the industry made.
How do appearance tags differ from genre tags?
Appearance tags are descriptors layered on top of a genre, and they carry no standard definition. They exist to help browsing, not to classify.
Bust-size labels are the clearest case. Kyonyu is the broad large-bust tier and bakunyu the tier above it, but no distributor publishes the cup size where one becomes the other, and the boundary shifts between catalogues. Some tags — binyu, "beautiful bust" — describe shape and contain no size information at all.
Treat these as adjectives in an advertisement rather than fields in a database.
Why do genre names change when you switch language?
Because localisation happens per catalogue, with no shared glossary. One Japanese tag routinely becomes three different English words across three sites.
The same fragmentation shows up in performer names. In our index, 197 of 2,333 named performers have a romanised stage name that disagrees with the name recorded in at least one other language's metadata for the same person (our index, 2026-08 snapshot, n=2,333). If names — the most concrete field available — diverge at that rate, genre tags diverge more.
Where do you start if you only want the essentials?
Learn six subject labels and four format labels. That covers the large majority of tags you will actually meet.
| Learn first | Why |
|---|---|
| hitozuma, shirouto, jukujo, chijo | The four highest-frequency subject shelves |
| kyonyu, bakunyu | The two appearance tags most used in titles |
| tanpin, kikaku | Tells you whether the performer or the premise is the product |
| BEST, soshuhen | Tells you the release is compiled, not new material |
Everything else is a variation on these, or a setting tag whose meaning is guessable from a dictionary.
Related questions
- JAV glossary: the 30 terms newcomers get wrong
- What does "hitozuma" mean?
- What does "shirouto" mean?
- Tanpin vs kikaku tanpin
- Kyonyu, bakunyu, hinnyu: how bust-size labels work
Each of these labels exists as a browsable keyword on this site. Opening one shows you how the tag is applied in practice, which is usually more informative than any definition.