A pair of small Butterfly Sandalwood beads. These are sometimes called Black Sandalwood as the Sandalwood is a darker variety.
Ojime beads are the sliding beads on the cord of the Inro Box. Geishas carried an Inro Box to hold their money and personal necessities. An Ojime bead is a Japanese bead or geisha bead that was used with an inro box and a netsuke bead.
Each bead is 15.4mm wide by 13.8mm long by 7.4mm thick with a 2mm vertically-drilled hole.
Product code 144.