One DoF robotic hand that makes human laugh by tickling through rubbing underarm. - Tatsuhiro Kishi; Takashi Nozawa; Ai Niibori; Hajime Futaki; Yusaku Miura; M. Shina; Kei Matsuki; Hiroshi Yanagino; Sarah Cosentino; Kazuo Hashimoto; Atsuo Takanishi (IROS, 2016)