Short answer
Follow Japanese cosplayers for a while and you may spot the word “ROM” next to a photo set. It’s not a computer chip. In cosplay, a ROM is a photo collection the cosplayer makes and sells themselves. Here’s where the word comes from, how doujin events like Comiket fit in, and how adult cosplayers sell their sets today.
Where the word “ROM” comes from
Look up ROM on Kotobank and you’ll only find two meanings: read-only memory, the computer chip, and internet slang for someone who reads a forum without posting (a “read-only member”). The cosplay sense isn’t in the dictionaries yet.
The history fills the gap. Japanese Wikipedia’s cosplay article says that from the 2000s, some cosplayers and photographers began making photo collections in print and on CD-ROM, and distributing them as doujinshi or doujin software at Comic Market and similar events, or through doujinshi shops. Doujin software is defined there as self-made work by individual creators or circles on digital media such as floppy disks and CD-ROMs. That history is the most likely reason the word “ROM” is used for cosplay photo sets.
Cosplay, doujin and Comiket in brief
Cosplay (コスプレ) is short for “costume play”. The Digital Daijisen dictionary defines it as dressing up as a character from manga, anime or video games, copying their costume and hairstyle, and notes that in English “costume play” means a historical drama, while “cosplay” is now understood worldwide. The Kyodo News glossary says the hobby is thought to have spread from doujinshi sales events.
| Term | Reading | Meaning |
|---|---|---|
| コスプレ | kosupure | Cosplay: dressing up as a manga, anime or game character |
| 同人誌 | dōjinshi | Self-published work by people who share an interest |
| 同人ソフト | dōjin sofuto | Self-made digital work, such as on CD-ROM |
| 写真集 | shashinshū | Photo collection, photobook |
| 即売会 | sokubaikai | Sales event where creators sell their own work |
| ROM | romu | In cosplay, a photo set, originally on CD-ROM |
A dōjinshi, in the Library and Information Science Glossary’s words, is a publication that like-minded people write, edit and publish themselves as a place to share their work. The biggest place to sell it is Comic Market. The official Comiket site describes it as Japan’s largest doujinshi sales event, started in 1975 and usually held twice a year, in summer and winter, at Tokyo Big Sight. Japanese Wikipedia adds that it is run by the Comic Market Preparatory Committee, with the summer event in August and the winter one in December.
Cosplay photo sets even have their own corner there. Japanese Wikipedia notes that from Comic Market 82, cosplay photo collections, in print or digital, were given their own genre, コスプレ, split off from the “デジタル（その他）” (digital, other) category.
How cosplayers sell photo sets today
The internet changed everything. Japanese Wikipedia describes cosplayers building their own websites from the 2000s, and social media later spreading cosplay worldwide, with cosplayers posting their own photos and selfies. Shoots happen at events, at private sessions arranged by cosplayers or photographers, and at paid photo sessions run by event companies and model agencies.
Adult cosplayers now also sell sets as posts on fan sites. On MyFans, a creator can put sets inside a monthly plan or sell them as single posts, so you can buy just the set you want. Our guide to tips, single posts and messages explains how buying a single post works. MyFans is for adults only: its help centre says minors can’t use it.
Buying sets the respectful way
Doujin work is easy to copy. Japanese Wikipedia notes that popular doujin software can be copied and spread illegally online on the very day it’s released. The best way to support a cosplayer is to buy from them directly, and never re-share what you’ve paid for. MyFans added a form for reporting unauthorised reposts in June 2026.
If you go to an event in person, follow its rules. At Comiket, according to Japanese Wikipedia, cosplay photography is banned outside the designated areas.
To find adult Japanese cosplayers, browse the Cosplay genre or our list of Japanese cosplay creators. On JapanCreatorFind, every creator is a Japan-based MyFans creator with an English profile, prices in yen and a link to their own MyFans page.
Cosplay creators we list
Tagged Cosplay from what each creator posts. Never ordered by commission. Profiles checked 10 October 2026.
Quick answers
What does ROM mean in cosplay?
A cosplayer’s self-made photo collection. The term traces back to the CD-ROM photo collections cosplayers began selling as doujin works in the 2000s.
Why is it called a ROM?
Dictionaries only list ROM as read-only memory or forum slang. Japanese Wikipedia records cosplayers selling photo collections on CD-ROM, which is the most likely origin of the cosplay sense.
What is Comiket?
Comic Market, Japan’s largest doujinshi sales event, according to its official site. It started in 1975 and is usually held twice a year, in summer and winter, at Tokyo Big Sight.
What is a doujinshi?
A self-published work made by people who share an interest, as a place to publish their own creations. Cosplay photobooks are sold as doujinshi too.
Where can I buy Japanese cosplay sets online?
Many adult cosplayers sell sets on fan sites. On MyFans you can join a creator’s plan or buy single posts. See our cosplay creators list.
Next step
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Filter the creators we list by genre, price and free plans.
Keep reading
- ROM (Kotobank: Digital Daijisen, Nihon Kokugo Daijiten and IT dictionary entries) (Japanese)
- コスプレ (Wikipedia) (Japanese)
- 同人ソフト (Wikipedia) (Japanese)
- コスプレ (Kotobank: Digital Daijisen, Seisen-ban Nihon Kokugo Daijiten and Kyodo News glossary entries) (Japanese)
- 同人誌 (Kotobank: Digital Daijisen and Library and Information Science Glossary entries) (Japanese)
- コミックマーケットの理念と実相 (What Comic Market is, official Comiket site) (Japanese)
- コミックマーケット (Wikipedia) (Japanese)
- Posts sold in a plan and as a single purchase (MyFans help) (Japanese) · English version
- Can minors use MyFans? (MyFans help) (Japanese) · English version
- June 2026 feature round-up, incl. the unauthorised-repost report form (MyFans help) (Japanese)