The Yellow Box Warehouse is the location where Light Yagami and the Task Force meet face-to-face with Near and the SPK. It is also where Light dies in the manga and where Teru Mikami dies in the anime.
The warehouse is located on an industry estate.
The warehouse is dirty and has small puddles of water on the floor. It is a large, empty room that looks as if it's been abandoned for a while. A notable feature is that the warehouse has only one door, which is both the exit and entrance.
Near creates a plan to unite all the Task Force members in the warehouse, along with the SPK. Near expects that Light will have Mikami waiting outside the warehouse door to peek in and write down everyone's name except for Kira's in his Death Note, killing everyone who knows of the existence of the Death Notes other than the two Kiras. Because Gevanni had switched Mikami's Death Note with a fake, Near is confident that no one will be killed by Mikami. Despite Light's preparations for the meeting, Near's plan succeeds, and Light is revealed to be Kira. In desperation, Light asks Ryuk to kill all the SPK members with his Death Note, but he writes Light's name instead, killing him. In the anime, Mikami commits suicide using a pen he used for writing the names of the SPK members, which creates a distraction, allowing Light to escape the warehouse. His injuries don't allow him to get far, however, and Ryuk kills Light in a different warehouse.