In the Seijo district of Setagaya, Tokyo, stands the house where Toshio Kashio conceived many of the inventions that brought Casio worldwide fame. Today, the former home of the second of the four founding brothers of this electronics empire houses the Kashio Toshio Inventions Memorial Museum. The display cases feature the brand's first calculators, its famous digital watches, and the legendary Casiotone keyboards. You can also visit Kashio's original studio, with hand-drawn diagrams and personal objects that explain his way of working. In the garden, known as the Forest of Inventions, you can breathe the premise that guided his entire life: inventions can arise from necessity, but they can also be used to create new ones.