Interesting but not too complicated for now Bewertet mit 3 von 5 Sternen
Would be more interesting if I knew Japanese as It is way too complicated to switch to English. Deleting Japanese localization just removes extension icon. You need to overwrite Japanese localization with English one by replacing file.
It would also be extremely helpful to put extension button into Google page itself instead of toolbar. Best option would next to Google's "search tools" link/button itself. Right now it takes toolbar space