  The symbol-pair read channel was first proposed by Cassuto and Blaum. Later,
Yaakobi et al. generalized it to the $b$-symbol read channel. It is motivated
by the limitations of the reading process in high density data storage systems.
One main task in $b$-symbol coding theory is to determine the $b$-symbol weight
hierarchy of codes. In this paper, we study the $b$-symbol weight hierarchy of
the Kasami codes, which are well known for their applications to construct
sequences with optimal correlation magnitudes. The complete symbol-pair weight
distribution of the Kasami codes is determined.
