The University of Tokyo Graduate School of Informatio n Science and Technology Department of Mechano-Informatics, JSK Laboratory Recent Activities Humanoid Robot in Every Day Life PR2 Fetch a Sandwitch (IEEE Spectrum) 2011 Semantic Object Search in Large-scale Indoor Environments (Manabu Saito, Haseru Chen, Kei Okada, Masayuki Inaba, Lars Kunze, Michael Beetz), In IEEE/RSJ International Conference