On this page there’s 4 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 177 address validator examples.)

The screenshot was taken on May 26, 2016 and depicts Rakuten’s Address Validator. In total, we’ve reviewed 45 of Rakuten’s page designs. To see them all, visit the full Rakuten UX case study.