This site is in accordance with the Web Content Accessibility Guidelines (WCAG), following the norms of barrier-free web design to provide navigation points (:::), Site Navigator, AccessKeys, and other such design methods. Following the WCAG, this site's content is divided into three big blocks :

1.) Main Menu (Top)　 2.) Sub Menu (Left)　 3.) Main Content (Center)

 

The Accesskeys used by this site are as follows:

Alt+U：Main Menu (Top). This block includes main menu links.

Alt+L ：Sub Menu (Left). This block includes the sub menus of the main menu. After pressing the keyboard shortcuts, it will jump to the left menu.

Alt+C：Main Content (Center). This block includes the main page content, which are introduced below.