Google’s Matt Cutts announced on Twitter at 2:30am this morning that over the past few months, Google has taken action on seven link networks in Japan.

Matt said, “over last few months they’ve taken action on seven link networks!” He said this makes him “incredibly proud” because this levels the playing field in Japan.

Here is Matt’s tweet:

There is no specific date as to when these link networks were targeted and penalized, so it would be hard to tell if your site was impacted by this or an algorithm. That being said, most of my readers here likely do not try to rank for Japanese related content (except a few maybe).

So let’s see who Google targeted over links in the past few months:

Google Penalized Link Networks In Spain, Italy & Germany
Google To Slap Link Networks In Italy & Spain
Google Targets Poland In Latest Link Network Penalty
Google Boots Large German Agency & Clients For Link Schemes
Google’s Matt Cutts: We’re Taking Action Against Buzzea, The French Link Network
Google’s Matt Cutts Calls Out Nailing Another Link Network
Google Penalizes Another Link Network: SAPE Links
Google Crushes Ghost Rank 2.0, A Russian Link Network
Backlinks.com: The Next Link Network Penalized By Google
Google’s Matt Cutts: Text Link Ads Link Sellers Targeted
Google Penalizes Blog Networks, Did SEOs Use It To Hurt Competitors?
Beware: Google To Squash Another Link Network Very Soon

Forum discussion at Twitter.