The recent turmoil at GG prompted me to give a good try to Joshiraku raw. The result is an interesting mix of things that are easy and difficult to pick up. The phenomena is somewhat awkward to explain, but here's a visual example from a single segment.
This frame is easy. Gan-chan wins "Miss Lens Frame" against a cast of noble meganekkos: Tsubasa Hanekawa of Bakemonogatari, Ritsuko Akizuki of Idolm@ster, Nodoka Manabe of K-ON, and Ichika Takatsuki of Ano Natsu. Don't ask me how Tsubasa qualified for this exclusive list.
This frame is moderate. Kigu wins something of a "Miss Most Cultivated Youth of Tokyo Metropolitan Area", 東京都(とうきょうと) 青少年(せいしょうねん) 育成(いくせい). Chiyo-chan requires no introduction. Kyon's Younger Sister next to her is more or less obvious. But the two remaining youths are a mystery. Note that they are not even prodigies - just iconic anime little girls.
This frame is hard, and that is despite the katakana. Teto wins "Miss Young Sunday", which is impossible to crack without the cultural knowledge. Google provides some fascinating hints. Characters are no easier. I have no idea who they are and what is common among them, and what links them all to Tetora. The leftmost outline reminds of the lead in that A-1 show, the name of which escapes me at the moment.
Verbal jokes in Joshiraku cover a similar spectrum of difficulty. The glass-half-full view is that it's not a completely impenetrable jumble, far from it. Even rudimentary Japanese will carry you to a good enjoyment. And not having to strain reading helps to enjoy how cute girls are by a lot.
QUICKIE: "ヤングサンデー" is a magazine, which features attractive young women in bikini on its cover. That much is obvious. The question is who the characters are and why they belong to the group.
UPDATE: Steven recruits help. Everyone seems to know Last Order, but how about the girl in furit hat? And the energetic older women?
AAAND, that was quick. The missing small girl is from Cooking Idol. The remaining 3 ripe women are Yuki Mochizuki of Tomehane, Mari Oda of Toritsu_Mizusho, and the titular character of Miyuki (the hoodie and blouse were on the cover of issue 1; also, not serialized in Young Sunday).
UPDATE 2012/09/29: As said on Twitter, the title may be supposed to refer 東京都(とうきょうと)青少年(せいしょうねん)の健全(けんぜん)な育成(いくせい)に関する条例. Very likely, I missed that. However, I think the joke shoots itself in the foot: if Kigu and the runner-ups are what the law brings us, then it's not a bad law, the joke says. It's like that photograph of a leftist chick with a sign: "Fighting for Peace Is Like Fucking for Virginity". Everyone immediately noticed that fucking is the only known way to make virginity. Not condoning the awful censorship by Japanese Mayor Bloomberg (why is it always the cities), but heh.