If you take a look at a map of Taipei during the Japanese Occupation, you'll discover that at that time Hsimenting was limited to today's Chunghwa Rd.
民國十一年，日本人為了更進一步穩固統治基礎，在台推行「皇民化」運動，廢除台北自清朝以來原有的街名，將台北劃分為六十四町。