  We present a review on the developments in the photoemission spectrometer
with a vacuum ultraviolet laser at Institute for Solid State Physics at the
University of Tokyo. The advantages of high energy resolution, high cooling
ability, and bulk sensitivity enable applications with a wide range of
materials. We introduce some examples of fine electronic structures detected by
laser photoemission spectroscopy and discuss the prospects of research on
low-transition-temperature superconductors exhibiting unconventional
superconductivity.
