For example, a while ago there was a show about the "social dancing" club at a high school (social dance seems to be pretty much the same as ballroom dance, but less exciting). However, apparently that activity was neither lame nor gay enough for Japanese TV, so they had to come up with something lamer while at the same time gayer. I think the conversation went something like this:
Japanese TV Exec 1: "Well, social dance is pretty lame and we did have that one homosexual character, but they were still dancing in boy/girl pairs, so it just wasn't quite enough."
Japanese TV Exec 2: "I know! How about Men's Rhythmic Gymnastics?"
And so, the show "Tumbling" was born.

So, the show just started last week and it seems to be following the classic Japanese trope in which "a rag-tag group of young people attempt to do X-activity, failing at first, but then over an amazingly short time period, barely longer than an 80's training montage, they pull together, overcome various adversities, and give it their all to succeed in the end."
In addition the sappy, predictable plot line, the show is rife with scenes of supple young men helping each other stretch out their tight hamstrings, polishing their batons, and running around in skin-tight spandex. So, you can see that the show is trying to appeal to a wide audience (Japanese school girls who don't know any better and creepy old men).
The characters are ridiculous as well--the main character, an unnaturally redheaded hooligan who is forced into joining the club to make up missing credits so he can graduate, but then realizes he has finally found an activity challenging enough to keep him interested--is probably the least astonishing. There is the captain of the team, who spends at least a third of the special 2-hour first episode crying because, "rhythmic gymnastics means everything to me," and who, surprisingly, I don't think is the gay one. (I know they are going to have at least one gay guy in there for good measure and my money's on the tiny, adorably effeminate first year who sounds like a girl.) There is also the captain's former teammate from middle school, who is now team captain at a high school famous for their prestigious men's rhythmic gymnastics team. He likes to act bad-ass and talk smack about how lame the other school's team is, apparently forgetting that at the end of the day he's still rolling around on the floor with five other dudes in sparkly unitards.
Based on the first episode, I am satisfied with the level of ridiculousness and am eager to see more (did I mention the supple young men running around in skin-tight spandex?) It should be an entertaining ride...

Official site (Japanese only) with preview video: http://www.tbs.co.jp/tumbling/