See the lowest recorded price on DLsite and FANZA pages
DLsite shows a discount percentage on most works all the time, so the percentage alone does not tell you whether the price is actually low. This script adds one small card to the product page with the lowest price we have recorded, when it was, how often the work was discounted and for how many days we have tracked it — from our daily record of 8,455 works.
Install the script (free, v1.0.2)
You need a userscript manager first (step 1 below). With one installed, the button opens the install screen.
What the card tells you
- Where today's price sits in our record: lower than any day we recorded / same as the recorded low / it has been cheaper (with the difference)
- The lowest price we recorded, and the date
- How many times it was discounted and the deepest discount; at regular price, when it was last on sale
- How many days we have recorded it. With under two weeks of data the card does not call anything a low
On sale and ranking lists, discounted works get a small label next to the title (for example "Record low ¥440"), so you can see which ones are really down without opening each page.
How to install
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Install a userscript manager
- Desktop (Chrome, Edge, Firefox, Safari): Tampermonkey. On Chrome 138+, turn on "Allow User Scripts" in the extension's details page
- iPhone/iPad: the free "Userscripts" app from the App Store, enabled as a Safari extension
- Android: Firefox with Tampermonkey
- Press "Install the script" above, then "Install" on the screen that opens
- Open a DLsite or FANZA product page — the card appears in the bottom-right corner (right edge on phones)
Supported stores
- DLsite (product and list pages, English and Japanese)
- FANZA: doujin, videos, anime, PC games, books
- MGS and DUGA
Works recorded: 8,455 (DLsite 1,982), as of 2026-10-07. Coverage grows daily.
Our promises
- No tracking of what you view. The price record is fetched once a day and matched locally
- Store links, buy buttons and cookies are never modified. No affiliate hijacking
- Plain, unminified code you can read (view the source, MIT license)
New to buying on DLsite from abroad? See how to pay on DLsite.
If it helps you
A rating on Sleazy Fork helps other people who wonder "buy now or wait?" find it. Bug reports and requests go there too.
FAQ
- Is it free?
- Yes. No account needed.
- Does it send the works I look at?
- No. It downloads our price record (about 100 KB) once a day and matches the page inside your browser. It never asks our server about individual works.
- Does it change buy buttons or links on the store?
- No. Store links, buttons and cookies are never touched. The only link it adds is "Price history on Otonaroku"; our work pages carry affiliate (PR) links to the stores.
- The price on the card differs from the page.
- We record prices once a day. Where the store shows the price in the page (DLsite, FANZA doujin), the card compares that live price with our record. Elsewhere it states the date of the record. Coupons, points and member discounts are not included.
- Some works show no card.
- If we have not recorded a work yet, the script shows nothing, so you never see empty cards. Coverage grows every day.
- Does it work on phones?
- On iPhone/iPad, use the free "Userscripts" Safari extension. On Android, use Firefox with Tampermonkey. On small screens the card starts as a small tab on the right edge so it never covers the store's buy bar.