- Ascended Fanon: "Nyaako" is now the official name for that Cat Smile girl.
- Name's the Same: Do not confuse this series' Madarame with another hot-blooded Madarame from Bleach. They were also voiced by the same actor at the time, Nobuyuki Hiyama.
- Never Trust a Title: Genshiken: Second Season is actually the third televised season, after Genshiken 2. The Japanese title actually literally translates as "Second Generation", which is more apt (dealing as it does with the "generation gap" between the old- and new guard of Otaku).
- Playing Against Type: You would expect Akira Ishida and/or Jun Fukuyama to voice a bishonen in this series... but it happens that both got casted unexpectedly for Kuchiki in the original anime and Nidaime, respectively.
- Portmanteau Series Nickname: "Genshiken" and "Kujiun".
- Technology Marches On: In one chapter, Madarame looks up a PC catalog and marvels at the 200 GB sizes of American hard-drives. The chapter was released in 2002, so that sort of size was high end at the time.
- Unintentional Period Piece: The series is a snapshot of the Japanese otaku subculture as it was at the time it was first published / aired. The references are contemporary, and it notably deals with the Moe boom and (to an extent) the "mainstreaming" of otakudom around the middle of the Turn of the Millennium. The gap between the old guard and the new generation is increasingly evident in Nidaime, where the idea of "otaku" has gone from something of an internalized, somewhat shameful identity to a (relatively) unstigmatized descriptor of someone who enjoys his or her hobbies with a shameless, fiery passion.
Trivia / Genshiken