"Watashi" is a Japanese word corresponding to "I" in English.
"Watashi" does not imply femininity; both sexes use it in
ordinary conversation. "Boku" is used primarily by men and
boys, but can sometimes be used by women. Much is often made by Americans and other foreigners
of gender-specific speech and usage in Japanese, but much
of this is overrated. Read _Japanese: The Spoken Language_
volume 1 (Noda) for more information.