In the environment with a width of 785 or less, the drawer menu using WAI - ARIA is used. (I am improving slightly to be more accessible)

When opening the drawer menu, the focus moves only within the global navigation until you select the "×" button or menu. We use Microdata to correspond to machine-readable Schema.org.

Global navigation, breadcrumbs, new arrival information, F & Q are marked up according to the specification of schema.org. Headers are fixed so that you can tap the navigation menu immediately even when scrolling with the smartphone.