An island name and a Heian story
Chikubushima-ryū (竹生島流) is a school of classical Japanese bōjutsu, the art of the long staff, named for Chikubushima, the small sacred island in Lake Biwa. Tradition attributes its founding to the warrior Nanba Heiji (難波平治光閑) in the late Heian period, in the age of the Genpei wars. That attribution should be read as the school's own story: no contemporary document confirms the founder or the founding, and the reading of his name itself rests on later transmission rather than period record.
What the tradition transmits
The school is an art of the plain wooden staff, trained through paired forms in which sweeping strikes, thrusts and parries are exchanged at full commitment. The staff's virtue in the Japanese classical curriculum was its honesty: it offers reach without an edge, so the practitioner must win with distance, timing and body placement rather than with the threat of a blade. Chikubushima-ryū's forms preserve that older battlefield logic of pole arms met and answered.
The plain staff as a complete education: reach, timing and honesty of contact with nothing to hide behind.
Between legend and survival
Like many traditions whose stories begin before their paperwork, Chikubushima-ryū is best described in two registers at once. As legend, it belongs to the Heian world of warrior monks and lake shrines. As history, a staff curriculum under this ancient name was carried through the Edo period, and reference works record the school in that later form; whether and by whom it is stewarded today has not yet been verified against the school's own or association records, so no present-day claim is made here. The archive records the school's traditional account as an account, without presenting it as verified early history.