An information recording carrier according to one embodiment has minute
pattern including plural grooves or lands formed to be substantially in
parallel and adjacent each other and comprises a supporting body having
the minute pattern, a recording layer formed on the minute pattern formed
on the supporting layer and a light transmission layer formed on the
recording layer. The minute pattern is formed under a relation of
P<.lamda./NA, where a pitch of each groove or land is P, a wavelength
of a laser beam is .lamda. and a numerical aperture of an objective lens
is NA. The plural grooves or lands have at least a wobbling region and
data is recorded wobblingly in the wobbling region by frequency shift
modulation. A phase relation between a high frequency portion and a low
frequency portion composing the frequency shift modulation is
.+-.(.pi./20.5) to .+-.(.pi./0.75).