# Ad-stir

> Best Sell Side Platform for PC and SmartPhones

Market: Japan
Main language: ja
Traffic rank (Tranco): #6,945
Topics: Technology
Last updated: 2026-08-30

## Best for
- awareness (medium): A Japanese sell-side platform with an RTB exchange, useful for buying Japanese smartphone and PC display reach programmatically.
- app installs (medium): A smartphone-focused sell-side platform connected to domestic and global DSPs, covering apps and sites.

## Ad spots
- General ad-placement inquiry (contact form) — Responsive display ad · bought via: Request a quote, Direct
- RTB Exchange (adstir Exchange) — Responsive display ad · bought via: Open auction

Rates, exchanges and minimum spend are on the full listing for signed-in accounts.

## About
Japanese app and site publishers using a mobile supply-side platform across Android, iPhone and web.

Ad-stir is a sell-side platform serving both PC and smartphone, covering apps and sites, describing itself as connected to domestic and global demand-side platforms through what it calls the largest RTB marketplace in Japan, alongside a PMP marketplace for premium ads. The platform states its ad technology has evolved from the dawn of RTB, as the start of its service in 2011.

Its features include automatic yield optimization based on request volume rather than ad-network-reported impressions, and no-fill detection that redirects traffic when no ads are available.

## Links

Full listing: https://adspotfinder.com/ad-stir
Website: https://en.ad-stir.com/
About this data: https://adspotfinder.com/llms.txt