  We used the Nobeyama 45 m radio telescope to reveal spatial distributions of
CCS and HC$_3$N in L1147, one of carbon-chain producing regions (CCPRs)
candidates, where carbon-chain molecules are dominant rather than NH$_3$. We
found that three cores (two CCS cores and one HC$_3$N core) exist along the
NE-SW filament traced by the 850 micron dust continuum, which are away from a
Very Low Luminosity Object (VeLLO - a source that may turn into sub-stellar
mass brown dwarf). The column densities of CCS are 3-7x10$^{12}$ cm$^{-2}$ and
those of HC$_3$N are 2-6x10$^{12}$ cm$^{-2}$, respectively, much lower than
those previously reported towards other CCPRs. We also found that two CCS peaks
are displaced from that of HC$_3$N. In order to interpret such interleaved
distributions, we conducted chemical reaction network simulations, and found
that slightly different gas densities could lead to large variation of
CCS-to-HC$_3$N ratio in the early phase of dark cloud evolution. Such a
chemical "variation" may be seen in other CCPRs. Finally we were able to
confirm that the L1147 filament can be regarded as a CCPR.
