
If you're looking for anime similar to Uchuujin Tanaka Tarou, you might like these titles.
Yamazaki comes to Earth from another planet, hoping to conquer our planet. But he soon realizes that in order to conquer the world, he has to conquer his own classroom first. That's why he comes up with lots of different ideas to get everybody to follow him. Also, he spends most of his time making Tatsuya (the class rep.) miserable. Having his loyal and strange dog Watanabe always by his side, and the help from his grandparents, Yamazaki is always doing crazy things with his class, completely forgetting his primary goal, and only thinking in becoming "The King of the Class".
The year is 1969 and alien invaders are trying to dominate the world. The only hope for Earth is AEGIS, a group of teenagers with the special ability to open 'Gates' that let them harness elemental powers gated from another dimension. AEGIS must now seek out other gatekeepers in order to stand a chance against the destruction of the world.
A girl named Yuuka encounters a being from the depths of the Earth named Chii-chan (a pun of 'Chiteijin,' the Japanese word for underground-dweller), and an alien named Ucchan (a pun of 'uchuu jin,' or 'alien'.) The two beings begin living with Yuuka who promises to protect them.
Poor Chow Ti lives in a demolished house with his son, Dicky. One day he heads to the junkyard and comes back with a green blob that turns out to be a cute, magical alien.
Three years ago the aliens invaded Tokyo. Nothing was ever the same again. But after a while, even impending doom starts to feel ordinary. The Japanese Self Defense Forces are still looking for a way to combat the looming alien threat three years after the invasion, but so far conventional weapons have had no effect on the mothership. Maybe it’s time to try something unconventional. Meanwhile, Kadode Koyama is in high school. She and her best friend avidly track the aliens’ movements on social media and less enthusiastically study for college entrance exams. When the end of the world is overhead, you learn to take things one step at a time.
Luluco is a normal junior high school girl whose father is a detective at the space patrol. One day, she visits the Ogikubo branch of the space patrol to save her father who is suddenly frozen. But she happens to be assigned as a space patrol by the chief director Overjustice. Wearing a space patrol suit with strange functions, will she able to save her father and keep the peace of Ogikubo from space criminals? And will she fulfill her life as a junior high school student, including love and study?
At a typical elementary school in Japan, yearly chores are being distributed. Yuri and 3 other students are chosen to be the beneficiaries of the alien hats for the year. Alien hats?! Yuri's sentiments, exactly. Despite her misgivings, she and her classmates must round up stray aliens that have escaped from a crashed spaceship -- with the help of the alien hats, of course.
In the series, Ataru Moroboshi's supernatural encounters with the feminine kind all start when he's chosen to play tag with an alien princess named Lum who invades the earth on her UFO. Ataru has ten days to touch Lum's horns or aliens will take over the earth! As it turns out, the game of tag is only the beginning of Ataru's troubles, as he continues to attract strange encounters with otherworldly beings like beautiful snow spirit Oyuki and the sexy crow goblin Princess Kurama!