Tokyo Kisen Co on May 26 held a naming and launching ceremony of the electric tugboat Taiga, built at Kanagawa Dockyard Co., Ltd in Japan.The Taiga is powered by an electric propulsion system that combines e5Lab-developed large-capacity lithium-ion batteries and a diesel engine."It is an eco-ship designed to protect the environment in areas surrounding the ports of Yokohama and Kawasaki