  Using the data release 1 of the Hyper Suprime-Cam Subaru Strategic Program
covering about 130 square degrees at high galactic latitudes, we have obtained
L dwarf counts based on the selection criteria on colors, limiting magnitude
and PSF morphology using $i$, $z$, and $y$ bands. 3665 L dwarfs brighter than
$z=24$ have been detected by these criteria. The surface number counts obtained
differentially in $z$ magnitude are compared with predictions of an exponential
disk model to estimate the thin-disk scale height in the vicinity of the Sun.
In the exponential disk model, we first fix the local luminosity function (LLF)
to the mean LLF of Cruz et al. (2007) and derive the best fit scale height of
260 pc. However this fit appears to be poor. We then allow the LLF to vary
along with the scale height. We use the LLF of Cruz et al. as a starting point.
The best-fit model is found for the vertical scale height of 380 pc. However
the $\chi^2$ minimum is rather broad and the 90% confidence interval is between
320 and 520 pc. We investigate another model by varying the scale height and
the density of the brightest magnitude bin, while other magnitude bins are
fixed to the mean LLF of Cruz et al.. We find an equally good fit with the two
free parameters and the best-fit scale height is again 380 pc, but the 90%
confidence interval is between 340 and 420 pc.
