If Akihabara is paradise for Tokyo's male otaku then Ikebukuro is the the abode of Tokyo's girl geeks.
Otome Road (乙女ロード ~ literally: Maiden Road) is a shopping street in Ikebukuro that features Japanese pop culture shops with a distinctly female bent.
Some female otaku are interested in manga and anime stories about romantic relationships between men. Many of the otaku shops in Ikebukuro are highly focused on this manga genre.
Ikebukuro is also known for dojinshi (self-published) manga.
There are a handful of butler cafes in the area (similar to maid cafes except that staff are men and customers are primarily female).