Reki-jo

Reki-jo (歴女) are Japanese female history buffs, who may also use the speech and mannerisms of pre-industrial Japan in their social gatherings. Reki-jo are a kind of otaku, people obsessed with a particular interest. Economic activity relating to the fad generated US$725 million per year.

Etymology
Reki-jo is a contraction of "girls who like history", more literally "history-loving girls" (歴史好きの女子).

Persons of interest
The Shinsengumi are a common interest of reki-jo. Other historical figures commonly of interest to reki-jo include:
 * Date Masamune
 * Sanada Yukimura
 * Ishida Mitsunari
 * Naoe Kanetsugu
 * Sakamoto Ryōma
 * Iwamoto Tetsuzō.

Notable reki-jo
Model Anne Watanabe, daughter of actor Ken Watanabe, is a notable reki-jo.

The manga and anime character Rika Yoshitake (吉武 莉華) from the Genshiken franchise is an example of a reki-jo in popular fiction.

In the series Girls und Panzer, the Hippo Team is made up of Ooarai Girls High School's reki-jo clique.