Abstract
This paper introduces the activities of the In-Rubble Robot System Mission Unit during the DDT project. The objective of the mission unit (MU) was to develop effective systems that can search for victims under debris. The main activities of the MU were as follows: (1) developing advanced search system based on IRS Souryu; (2) developing advanced tools such as jack robot, cutter robot, intelligent search cam, and KURUKURU-3; (3) developing a rescue system carrier named BENKEI-2.