  We have developed a method to make a spectral-line-based survey of hot cores,
which represent an important stage of high-mass star formation, and applied the
method to the data of the FUGIN (FOREST Unbiased Galactic plane Imaging survey
with the Nobeyama 45-m telescope) survey. First, we select hot core candidates
by searching the FUGIN data for the weak hot core tracer lines (HNCO and
CH$_3$CN) by stacking, and then we conduct follow-up pointed observations on
these candidates in C$^{34}$S, SO, OCS, HC$_3$N, HNCO, CH$_3$CN, and CH$_3$OH
$J=2-1$ and $J=8-7$ lines to confirm and characterize them. We applied this
method to the $l = 10^\circ-20^\circ$ portion of the FUGIN data and identified
22 "Hot Cores" (compact sources with more than two significant detection of the
hot core tracer lines, i.e., SO, OCS, HC$_3$N, HNCO, CH$_3$CN, or CH$_3$OH
$J=8-7$ lines) and 14 "Dense Clumps" (sources with more than two significant
detection of C$^{34}$S, CH$_3$OH $J=2-1$, or the hot core tracer lines). The
identified Hot Cores are found associated with signposts of high-mass star
formation such as ATLASGAL clumps, WISE HII regions, and Class II methanol
masers. For those associated with ATLASGAL clumps, their bolometric luminosity
to clump mass ratios are consistent with the star formation stages centered at
the hot core phase. The catalog of FUGIN Hot Cores provides a useful starting
point for further statistical studies and detailed observations of high-mass
star forming regions.
