Land of dead in Fijian belief system.

In Fijian mythology, Bulu is a name for the 'world of spirits' (presumably the underworld). In the month called Vula-i-Ratumaibulu'the month of Ratumaibulu', corresponding roughly to November, the god Ratumaibulu comes from Bulu, the world of spirits, to make the breadfruit and other fruit trees blossom and yield fruit.