In the Arukazik lineup, "BM" stands for Bottom & Bream.
The Arukazik Japan BM. Cube is a highly specialized jighead designed to dominate the roughest, most unforgiving terrains, such as oyster beds, sharp reefs, and heavy riprap, where the biggest Seabream, Wrasse, and Rockfish hunt.
 
Standard jigheads roll and snag instantly in these environments, but the BM. Cube is engineered differently.
Its unique trapezoidal, flat-bottom sinker acts just like the lip of a crankbait. When it hits a rock, the head deflects off the structure, protecting the hook point and preventing frustrating snags.