On this page there’s 5 highlights (view in Baymard Premium) outlining what Rakuten are doing right and wrong.
(Tip: use the arrows above or on your keyboard to navigate all 632 filtering options examples.)

The screenshot was taken on March 30, 2015 and depicts Rakuten’s Filtering Options. In total, we’ve reviewed 45 of Rakuten’s page designs. To see them all, visit the full Rakuten UX case study.