The building survived the war and remained in use all the way up through 1993.
The city had decided to turn the entire site into a park, but citizens rallied together and convinced their local government to preserve the building as a war memorial.
Just like the Hitachi Substation shown in the previous photos, this airplane hangar sits in a peacful residential area in western Tokyo. It was originally built--with labor from local junior high school students, I might add--to hide the Heian fighter jets that were tasked with defending the city's airspace during the war. This is one of only three hangars that are still around today.