Thread:Roboartitec/@comment-3390396-20130615145116/@comment-4556650-20130615151147

It's actually 障壁 from the manga. Get the kanji's here: http://tablethrowing.wikia.com/wiki/Pages_to_be_made_on_Nanatsu_no_Taizai_Wiki

(it took me a long time to collect them from the manga)

Therefore, romaji = Shōheki