The Supreme Court of Japan (最高裁判所 Saikō-Saibansho; called 最高裁 Saikō-Sai for short), located in Hayabusachō, Chiyoda, Tokyo is the highest court in Japan. It has ultimate judicial authority to interpret the Japanese constitution and decide questions of national law (including local bylaws). It has the power of judicial review; that is, it can declare Acts of the National Diet, local assemblies, and administrative actions, to be unconstitutional.