If you're looking for anime similar to Hetalia: The Beautiful World Extra Disc, you might like these titles.
In the name of keeping global peace, politicians have come up with a new method of sorting out disputes: they meet in locations across the world and wager on a game of Mahjong. Koizumi is the former Prime Minister of Japan’s Cabinet who is not only a Mahjong master, but won't let anything stop him from attending a game – not even three bullets to the chest from hired hitmen! No matter what obstacles appear in his path, be they alien-controlled ministers, weapons of mass destruction hurtling towards Tokyo, or the resurrected form of Chairman Mao, Koizumi will play his best hand, down to the very last tile.
In 1977, two parents’ lives were changed forever when their thirteen-year-old daughter was abducted. After nearly twenty years of life without her, they finally learn the grave truth of Megumi’s fate: she was snatched by North Korean spies and committed suicide in 1994. Now, in the present, the Yokota’s still fight for justice for the numerous Japanese citizens kidnapped in the late 1970s; their plight will ensure that no other family has to suffer, and the chance to bring the kidnapped loved ones back to their home shores.
After facing numerous defeats by Dejiko and her eye-beam, Piyoko and the Black Gema Gema gang decide that a new strategy is needed. Piyoko also has a mouth-rocket attack, but since it takes longer to shout out the name of this attack Dejiko's always hits first. And so (after a lot of planning, equating and messing around) the gang members think up new ways to improve the attack, from talking faster to treating the mouth with more respect. But will any of these ideas work when Dejiko arrives on the scene?