Azumanga Daioh, Nichijou Recommendations
Both are school comedies in a 4-koma format.
Very similar humor and the inspiration from Azumanga Daioh is very clear in Nichijou.
Nichijou is far more episodic and has some sci-fi elements, but the overall feel is the same.
Both of these manga focus on the lives of high school girls and their ordinary day to day life. Except their life isn't really all that ordinary, crazy stuff happens all the time. Nichijou cranks the absurdity factor up by ten and presents you with a much wilder ride but the base premise is still there. Both still have lovable characters and both will give you a fun time.