The Tokyo area is one of the most densely populated places on the planet. Very small properties have long been a feature of the urban landscape, but many modern "kyosho jutaku" showcase the expertise with which architects satisfy the requests of future owners. We join architect Koshima Yusuke as he visits these tiny houses, and sees for himself the clever ideas that are used to create a cozy living space. This time, a gradient of light spilling down a spiral staircase.

There are more than 1,300 companies in Japan that have been in business for over 200 years. How have these companies, which have survived challenges such as wars, natural disasters and economic crises, continued to operate for so long? This time, we will take a look at a company that was founded as a kimono shop in 1611 and later developed into a department store. What difficulties has this company overcome during its long history? What has it worked to preserve for over 400 years? Learn the secrets of its longevity.