If you liked the Yoshimune anime, the Anime-Planet community thinks you'd like:
When Kaede, a girl frustrated with her grades like any other teenager, finds a female Ninja attempting to steal her underwear, she didn't expect a friendship to be the result. And as the modern day world of ordinary high schooler Kaede collides with Ninja-in-training Shinobu, she soon comes to discover that the world of modern day Ninjas are filled with parties, picnics, and the training of the elder master Ninja yellow form changing glob: Onsokumaru!
2x2 Shinobuden and Yoshimune are both comical looks at the (unusual) lives of samurai/ninja. Wacky and random comedy abounds in both, and in general the feel is pretty similar. If you liked one, try out the other.
When the young Kotaro (errr...Rotaro) washes up on Papuwa island with a case of amnesia, he has no idea that his life is about to take a turn for the bizarre. With housemates such as the man-maid Liquid, an asexual snail and a transsexual fish with legs, Rotaro will have his hands full! But beneath the tranquility of the island lies a dangerous secret that could destroy the island, and the answer lies only with Rotaro. With enemies from his past afoot, his friends trying to eat him and a giant poisonous mushroom trying to get him high, what’s a young boy to do?!
Papuwa, like Yoshimune, is good old-fashioned hilarious fun. Papuwa is far more random than Yoshimune and to be honest, I enjoyed it a lot more; regardless, if you liked the wacky aspects of Yoshimune, try on Papuwa for size.