A Tokyo woman eager to network with other women interested in information security recently organized a "girls-only" event on the subject in the Roppongi district touted as the first in the country.

Called "CTF for Girls," the event also offered beginners a chance to study ways to defend and attack computers. CTF stands for "Capture the Flag," a term used in computer security competitions.

Although there are few women in the industry, Asuka Nakajima, 23, developed an interest in the field when she was in high school and read a novel about computer hackers.