A reproduction method includes a step of performing error correction of
the first coded data piece and generating error location information
which represents an error location of the first coded data; a step of
generating erasure locator information which represents an erasure
position of the second coded data piece, based on the error location
information; and an erasure error correction step of performing erasure
error correction of the second coded data piece based on the erasure
locator information. The erasure locator information generation step
includes the step of, when the error location information indicates that
no error is detected in the Nth first symbol and the (N+2)th first symbol
and that an error is detected in the (N+1)th first symbol, determining at
least one of the plurality of second symbols provided adjacent to the
(N+1)th first symbol as representing erasure.