Yahoo! Flea Market Yahoo!フリマSample
PORTER タンカー ショルダーバッグ ブラック 美品
¥12,800≈ $85
Get alerts like this →CAUGHT 11sAFTER LISTING
ピコン! Japan drops it. You catch it.
Mercari Japan & Yahoo! Auctions alerts, in seconds.
Save a search once. We watch every new listing on Mercari, Yahoo! Auctions, Rakuma and Yahoo! Flea Market and ping your Discord, Telegram, email or phone the second one matches.
Free plan, no card. Just an email: no Japanese account or phone number.
- 11sto catch a new Yahoo! Flea Market listing
- 28sto catch a new Mercari listing
- 4.5M+new listings screened a day
Medians and daily volume, measured on our live system, Sept 2026
Sample alert
Japan AlertsnowPORTER タンカー ショルダーバッグ ブラック 美品A sample of what an alert looks like. Live listings load here as they are caught.
三コマ How it works
Refreshing four apps is how grails get away.
Refresh…
refresh…
The good ones sell while you sleep.
- Mercari メルカリ
- Yahoo! Auctions ヤフオク
- Rakuma ラクマ
- Yahoo! Flea Market
porter smokypsa10 hancockpentax 50mm
4.5 million new listings screened every day.
Japan AlertsAPP
Yahoo! Flea Market · psa10 hancockPSA 10 Boa Hancock SP parallel¥72,000 · ≈ $480caught 4s after listing
Real catch from Sep 30, 4 seconds after it was listed.
Set it up in under a minute. Buy through your preferred proxy: every alert links straight to the listing.
Start free →料金 Plans
Pick your capsule.
Every tiny capsule is one saved search, watching all four marketplaces around the clock. Pick how many you run and how fast you hear.
Free
$0
No card
3 searches
each watches all 4 marketplaces, 24/7
You hear ~3 hours later (digest)
listed 14:02 → digest around 17:00
- No Deep SearchPro and Reseller also search item descriptions
- Discord, Telegram, email or push
- Live feed
Pro
$19/mo
Founding price, then $24. Yours for life at $19.
20 searches
each watches all 4 marketplaces, 24/7
You hear in seconds
listed 14:02 → pinged 14:02
- 5 Deep Searchesalso search item descriptions: finds grails in bundle lots
- No ads
- Live feed
Reseller
$49/mo
For sourcing inventory
60 searches
each watches all 4 marketplaces, 24/7
You hear in seconds
listed 14:02 → pinged 14:02
- 20 Deep Searchesalso search item descriptions: finds grails in bundle lots
- No ads
- Live feed
7-day free trial on Pro · card required · cancel anytime · yearly: $190 Pro / $490 Reseller.
Which one? A few grails → ProSourcing inventory → Reseller
よくある質問 FAQ
Quick answers.
How fast is “seconds”?
Measured from listing to catch in Sept 2026, the median is 11 s on Yahoo! Flea Market, 28 s on Mercari and 30 s on Yahoo! Auctions. Pro and Reseller send each alert the moment it’s caught. Free bundles your finds into a digest about 3 hours later.
Do I need a Japanese account?
No. Just an email: you sign in with a magic link, no password. No Japanese account, phone number or app.
Doesn’t Mercari have alerts?
Mercari’s saved searches cover Mercari only, and their alerts are mostly email digests. We watch all four marketplaces and alert you within seconds, wherever you want them.
Where do the alerts go?
DiscordTelegramEmailPhone pushLive feed
Each alert is a rich card: photo, price in ¥ and your currency, and a direct link to paste into your preferred proxy.
Can I use my own Japanese keywords?
Yes. Search in English or Japanese: we suggest the Japanese terms and you can edit them. Then filter by price in your own currency, up to 100 exclude words, condition, and hide business sellers.
人気 Popular alerts
Start from a ready-made alert.
Grails sell fast. Get there first.
Your first search takes under a minute. Just an email.