Every kind of architectural definition has an in-between space - Sou Fujimoto

In this movie Japanese architect Sou Fujimoto discusses his philosophy of designing structures that are "in between" opposing concepts such as nature and architecture, and says the approach could work just as well on a skyscraper as a small private house.

"Nature and architecture are fundamental themes [of my work]," says Fujimoto, speaking to Dezeen after giving his keynote speech at this year's World Architecture Festival.

"I like to find something in between. Not only nature and architecture but also inside and outside. Every kind of definition has an in-between space. Especially if the definitions are two opposites, then the in-between space is more rich."

Fujimoto gives his recently completed Serpentine Gallery Pavilion in London as an example of his philosophy, in which he used a series of geometric lattices to create a cloud-like structure.

"In various meanings it is in between things," he says of the project. "It's made by a grid, but the shape is very soft and complex. The experience is half nature and half super-artificial."