Deadly giant bugs have begun to rampage through Edo Japan, and the Mushibugyou Protection Office must exterminate the threat. With the body count rising, the group requests aid from famed samurai Genjuurou Tsukishima, but due to an injury the man sends his inept-but-determined son Jinbei in his stead. Almost killed in his first encounter with the creatures, Jinbei is saved by his new colleagues of the Mushibugyou: fiery ninja Hibachi, violent warrior Koikawa, young onmyouji Ichinotani, and the enigmatic Mugai. Now, the group must learn to work together to overcome the many-legged menace!
Drawn to the mystique of the unknown, Hunters travel the world in search of terrifying creatures, incredible riches, and unexplored lands. Gon Freecss is a naive-yet-determined young boy who aspires to join the ranks of these individuals, in order to find his missing father Ging - a master of the profession himself. To reach his goal, he partakes in the formidable Hunter Exam, a series of tests that push the participants to their physical and mental limits, with a Hunter License as the prize. During the exam Gon befriends vengeful Kurapika, doctor-to-be Leorio, and skilled assassin Killua, who have entered for their own reasons. But with the sinister Hisoka standing in their way, will Gon and his friends be able to succeed in obtaining their reward, or even escaping with their lives?
Both series have a seemingly lighthearted tone but seem to possess gruelling moments of despair. Hunter x Hunter moreso than Mushibugyou both have extremely colourful worlds despite the violence and bloodshed taking place in them. Mushibugyou is basically Hunter x Hunter light with a sillier premise and more fanservice.
In the wake of a rebellion that shook Japan twenty years prior, Togame Hida, general director and strategist for the army, seeks to obtain the 12 "deviant blades" created by master swordsmith Shikizaki Kiki to help add stability and security to the Bakufu government. To aid in this endeavor, she looks to enlist the help of Yasuri Mutsune, head of the Kyotou-ryu school and hero of the rebellion. But when she arrives on the island where he lives in exile, she finds him dead, succeeded by his skilled yet slightly daft son Shichika. Undeterred, the two set off from the island in search of the swords armed only with Togami's sharp strategic mind and Shichika's powerful, swordless Kyotou-ryu.
Both animes have a pretty colorfull animation style and are set in a medieval japan where samurai and shoguns rule. Where Katanagatari is more political, storybound and focussed around 2 main characters who collect legendary katana's and fall in love, Mushibugyou is more comical and episodal and about a boy who fights bug monsters who threaten Edo.
Both animes have their moments of comedy and entertaining fights, but they can both get serious as well.