Zoku Sayonara Zetsubou-sensei (TV)

In episode three, near the beginning we are shown a stack of magazines in Fujiyoshi's room. The covers to these magazines are Ritsuka and Soubi from Loveless dressed as Ed and Roy from Fullmetal Alchemist; Genjo Sanzo from Gensomaden Saiyuki; and Kantaro, Yoko, and Haruka from Tactics. You cannot see any of the characters from Tactics directly, but there are several hints for those who have seen the series, such as Kantaro's clothes and Haruka's broken bowl.

In episode three when Fujiyoshi picks up the magazine with Zetsubou Sensei as the cover, the title of the magazine is "Animejo", a pun off of the anime magazine "Animeju"

In episode three it is mentioned that Jinroku-sensei is a fan of the band Nightmare. The band has done themes for several anime recently, including Death Note and Claymore.

In episode three, while watching through the anime for scenes of her pairing, a figurine of Zack from Final Fantasy VII is shown next to the television, recolored.

In episode three, after texting her friend, Fujiyoshi uses a 'couple search' to find the statistics against PinexNapple as opposed to NapplexPine. These are quite common in fanbases with varied pairings.

Episode 1, arround 16.16, you can see a box with the word ''Genshiken'' and this is the name to another anime.

In Episode 1, right at the beginning, when Sensei is lecturing the girls about finding members for his food society, The girls faces are covered up by the kanji that make up the names of the seiyuus that play them

In Episode 1, 5 minutes 49 seconds, it display the image of pirates, them are the characters of the One Piece Series

In episode 1, when HAMASHO kidnaps Nozomu and attempt to change his body, Nozomu begs that he could be turned into an Imagin. Imagin are wish-granting mutants in Kamen Rider Den-O.

In episode 1, about halfway through, when the "net idol"'s picture shows up, some of the other faces shown have hairstyles that resemble negima characters such as Chao (top, center), the twins (center), Kaede (left + center) and yue (top right).

In episode 2, Fujiyoshi complains that her Kaworu cans have been turned into Gendou cans, both characters from Neon Genesis Evangelion (Gendou's face being silhouetted on the cans she is holding)

In episode 2, when Perry laughs after having told the story of why he came to be Perry, he laughs four times while it is only written twice in the background. This may be a reference to the last line of the famous 'All Your Base' translation.

In episode 2, when words are written all over Itoshiki-sensei's body, Kei mentions that "Any parts that aren't drawn on will be taken by evil spirits." This is a reference to an old legend about a man who is caught in an evil spirit's trap and escapes by writing sutras all over his body. In the story his friends forget to cover his ears, and they are taken as proof that the spirit searched for him.

In episode 2 at about 5:45, we see the Commodore body-painted half blue and half red, this may be a reference to a show that the band Tool (or an other band, if i am mistaking) put up once where the lead singer was body-painted that way.

In Episode 3's first segment, "Pine x Napple" are clearly a reference to Coco and Nuts from Yes! Precure 5. Harumi is, of course, attempting to draw a yaoi doujin of them. Also in her fangirl interests are Code Geass (as the poster on the wall with Lelouche and Suzaku lookalikes suggests) and SZS itself - she has the Character Song CD on her bookshelf.

Also in episode 3, about 2:18 in, the magazine covers reference several popular anime series, e.g. Mobile Suit Gundam 00 (dubbed "Gundam OOO") and Code Geass: Lelouch of the Rebellion (with Itoshiki cast as "Lululululushu of the Self-depreciation").

Another Code Geass reference in episode 3 are the action figures of Lelouch, C.C., and Suzaku on Harumi's table about 3:24 in. They are flanked by figures of Straw Hat Pirates from One Piece.

A background dialogue in episode 3 (about 5:24 in) references the fact that the seiyu Kikuko Inoue always refers to herself as a 17 years old, going to great extents to promote this image. An additional twist is that Inoue voices Manami Okusa in ZSZS, a high-school student who is already married and works multiple jobs.

In episode 3 about 3:28-30 two mecha figures are shown holding hands. The designs were significantly altered but based on a few obvious similarities it can be concluded that they are indeed the Strike Freedom (white mecha) and Infinity Justice (red mecha) from Gundam Seed Destiny.

In episode 3, about 4:19-20. There is a figure (the one with the blue scarf) of Setsuna F. Seiei from Gundam 00 near the TV.

In episode 3, around the 4:26 mark, there is a scene where a pencil holder tin has a picture of Mesousa from the Pani Poni Dash! anime, which shares both the production company (SHAFT) and director (Akiyuki Shinbo) with Zoku Sayonara Zetsubou Sensei.

In episode 4, at approximately 10:22, as Itoshiki-sensei is looking for an unread book, the library card lists 'Amasawa Seiji' as the most recent borrower. This is taken directly from Ghibli's 'Whisper of the Heart'.

In episode 4, about 7:22 in, the way Chiri takes down the first alien robot (including the exclamation "Erster!", meaning "The first one!" in German) is an obvious homage to the movie End of Evangelion where Asuka destroys the first mass-produced Eva Unit in exactly the same manner.

In episode 4, about 20:21 in, when Majiru yells at Kiri for talking about meaningless stuff, he mentions the topic of "how to eat a chocolate coronet". This may be an allusion to the infamously prolonged dialogue in the first episode of Lucky Star that explored this very topic.

In Episode 4, upon unearthing the ultimate weapon, they find that it's a stone mask. The shape and overall design of the mask is very similar to the one seen in early volumes of Jojo's Bizarre Adventure. (Most notably the fangs over the bottom lip.)

In episode 4, while Majiru and Komori are talking, the poster on the wall contains portraits of characters from the 'Boku no Pico' series

In episode 4, in the library scene with Jun Kudou, some of the shelf categories are names of Japanese manga magazines publishers, like Kodansha, Shogakukan and Kadokawa

In episode 4 at the begginning of the library chapter, the first shot is of various books, which share the titles of Sayonara Zetsubo Sensei's anime and manga chapters

In Episode 4, at about 8:25, the attack Kitsu uses is obviously a reference to the Shining Finger attack Domon Kasshu uses in G Gundam. Also at about 8:38 she uses the "L" from Ultraman Seven.

In Episode 4,the aircraft fighter squadron which was wiped out by the "fart" robot and the single aircraft seen flying in 07:45 actually was a Lockheed Martin F-22 Raptor equipped by external fuel tanks.In order to safeguard secrets of the aircraft's technology U.S Congress had banned the exporting this F-22 to another allied countries even to Japan.

In episode 5, about 6:09, there is a spoof art of Eureka seveN.

In episode 5, there is a silhouette of two Dragon Ball Z characters fighting in the background.

In Episode 5, at about 11:14 the bag is a reference to Initial D(the kanji and artstyle are the game) plus the name Fujiwara is the name of the Tofu shop and owner.

In episode 6, Nozomu mentions that whatever was unknown to Kago and Tsuji's parents have been revealed to them. Ai Kago and Nozomi Tsuji are idols in real life that used to be in the all-girl J-pop groups in Hello! Project, namely Morning Musume., Mini-Moni., and their own pop duo, W (Double U). Kago was removed from Hello! Project from a scandal and Tsuji became pregnant before marriage.

In episode 7 around 1:20 in the parody opening, the cellphone text shows the infamous konami code up, up, down, down, left, right, left, right, B, A.

In episode 7, about 4:31, the shot of Maria becoming invisible and disappearing is probably a homage to the first Ghost in the Shell movie, where the Major does the same thing after the opening shootout.

In episode 7, about 14:20, the girls' hair cuts and colors closely resemble those of the three protagonists of Lucky Star: Kagami (left), Tsukasa (right), and Konata (middle).

In episode 7 of the anime at 15:45, there is a title card showing Majiru in a chair and room similar to that of the Architect's in The Matrix trilogy.

In episode 7, at around 4'25", amongst all the ridiculous sentences that are said to be heard one million times, Nozomu Itoshiki deals with telling a boy named Tsubasa "he must be very skillful in soccer". This refers to Tsubasa Ōzora, main character from the famous manga "Captain Tsubasa", written by Yûichi Takahashi, manga in which soccer is the main framework.

In episode 8, at around 11'10", about the "May Revelations", Rin Itoshiki deals with "Mei's and Satsuki's fantasies revealed", those characters being seen on a TV set. It refers to the two children from Hayao Miyazaki's movie "My neighbor Totoro".

In episode 9, about 14:20, a box of cigarettes appears and the cigarette brand is Lucky Star (Raki Suta in original). Right then, there is Konata, Kagami and Tsukasa from Lucky Star sitting in the class.

In episode 10 at the shot where the three otaku are shopping for something, one of the games in the background is the visual novel "ef - fairy tale of the two"

In episode 11, timing 09:38, the scene where Kaere was attached to a cross and stabbed by a spear is an obvious reference of Evangelion. The spear used is the Spear of Longinus which is also from Eva.

In episode 11, the "detective" makes the observation that the various deaths occuring around the mansion also occured in different anime. The death involving the juice box and the message "goal" was a reference to AIR, and the person being hung on the cross with a lance holding them in place may have been a reference to Neon Genesis Evangelion

In episode 12, about 17:16 in, Ikkyū-san mentions that he watched "Cucuruz Doan's Island", episode 15 of the original Mobile Suit Gundam series. In fact, this episode was cut out from the American release of the series because director Yoshiyuki Tomino felt it wasn't up to the standard of the rest of the series.

In episode 12, the back of one of the people playing pachinko looks exactly like Reinhard von Loghengramm from "Legend of the Galactic Heroes".

In episode 12, Ikkyu mentions that he originally got into ponytails by watching horse racing. The character shown in the background is Haruhi Suzumiya from "The Melancholy of Haruhi Suzumiya," mocking Kyon's dramatic statement at the end of the series. Both Ikkyu and Kyon are voiced by Tomokazu Sugita.

In episode 12 the charismatic rock star named ozeki is a reference to Yutaka Ozaki who was found dead in 1992. He was found laying in a street in Tokyo without a shirt, and Kaere even sings a short part of his song "15 no Yoru"

In episode 12 the man who claims to produce video game idols is playing the game "The Idolmaster" and Yayoi can be seen on the screen with different coloured hair

In episode 13, at timing 12:00, the character that's auditioning for Meru's voice is non other than Hatsune Miku, one of the Vocaloid.

In episode 13, at about 16:00, Harumi is talking to Chiri, asking if she is going to see the new Prince of Tennis movie.

In episode 13, at around 7:00, Sensei is found after a fierce snow storm and is seen with a tail and is acting like a dog. This scene/encounter is a reference to the movie Snow Dogs.

In episode 13, at around 11:00 when the line for auditions is shown, a green haired Kaito and red haired Rin and Len from the popular software Vocaloid are standing in line.

In episode 13, at 19:46, a poster is the background portrays characters from the anime Ef- a tale of memories/melodies.

In episode 13,at 11:08 when the people in the line is shown another vocaloid character Meiko appeared with blonde hair in front of the bear

In episode 13 Images of Ghost Sweeper Mikami and Zettai Karen Children appear in the tsundere café. Both works were written by Takashi Shiina