Mister Tōsenbō is a supporting antagonist in the 1967 manga and anime series Donkikko, created by Shotaro Ishinomori. He is a middle-aged man who serves as a recurring obstacle for the young protagonists. In terms of background, he is a local figure in the town where the story takes place, often crossing paths with Donkikko, Dondon, and Gonbei as they explore their new urban surroundings. His personality is defined by a grumpy and mischievous nature, frequently described as a mean-spirited old man who delights in causing trouble for the main characters. His primary motivation appears to be a general cantankerousness and a desire to assert his authority or get his way, often clashing with the carefree and rebellious spirit of Donkikko. In the story, Mister Tōsenbō functions as a comic antagonist, creating conflict and driving many of the daily troubles the group faces. He is particularly associated with the antique shop Wanwan-do and its owner, as he often antagonizes the shop's daughter Ayame, who is a friend of Donkikko. His key relationships include a hostile rivalry with Donkikko and his friends, and he also has a subordinate named Yoyo, who assists in his schemes. In terms of notable abilities, Mister Tōsenbō wields a pipe that he carries with him, which can be used as a club or a blunt weapon in confrontations. The character shows little development over the course of the series, remaining a consistently irritable and obstructive figure whose antics provide the comedic friction typical of the show's episodic misadventures.