This episode is a dialect problem special where they played various old clips about regional dialect issue from Ep. 268, Ep. 125, Ep. 161, Ep. 200, Ep. 101, Ep. 163. They also showed the issue where people outside Ibaraki pronounce the prefecture's name as "Ibaragi" (Ep. 163 and 268), rarely heard words of surprise across Japan (Ep. 287), strong accents that seems unintelligibleto standard Japanese (Ep. 263), the truth behind the word "payapaya" that is used in Tohoku area (Ep. 200), item names in various dialect (Ep. 119), the word "Shiasatte" meaning in Yokkaichi City, counting intonation problem (Ep. 119), Tsugaru vs Nanbu problem (Ep. 119), and the Koushuu dialect issue (Ep. 30). (Source: Griffin Seannery at MyDramaList)