-a]u 17:01 is dedicated to the works of Go Hasegawa, with exclusive photographs for his first project House in a Forest to newer works such as the Chapel in Guastalla This edition of a+u 17:01 is dedicated to the works of Go Hasegawa, spanning his career from 2006 with his first project House in a Forest to his newest works such as Chapel in Guastalla. Exclusive new photographs and detail drawings show his career progress from forest cabins to urban plazas. Throughout his career, Hasegawa has focused on how people perceive spatial dimensions, gravity, and time. Through different project types, he challenges pre-existing ideas on largeness/smallness, heaviness/lightness, and newness/oldness. New detail sections show the connections between architectural elements and structural parts, while visualizing his observations on the surrounding site and its history. The projects are organized by structure type progressing from light to heavy through wood, steel, and concrete. Text in English and Japanese.