As we look towards distant galaxies, fluctuations in the intervening mass distribution cause a slight, coherent distortion of their apparent shapes. The statistical measurement of this effect, known as weak gravitational lensing, has become a fundamental tool for observational cosmology, on par with studies of the CMB and Supernovae. My work focuses on measurements of weak gravitational lensing with the aim of understanding the role that dark matter plays in shaping the large-scale structure in the Universe. I am very excited to join IPMU and in particular to be involved in the SuMiRe project which will be one of the leading surveys for weak gravitational lensing in the next decade.