After climbing the 135 stone steps, a bright vermillion building catches your eye. Isaniwa Shrine is one of the three Hachiman-zukuri-style architectural works and is designated an Important Cultural Property. Passing through the gorgeous double-storey gate, you will be stunned by the magnificent main shrine building with gold-leafed columns, curving beams and beams with engraved decorations. The shrine has a number of documents on Japanese mathematics displayed along its corridors demonstrating the popularity of Japanese mathematics among the local people of Matsuyama.