A total of 1.5 gigawatts (GW) worth of PV systems were installed in Japan in the first quarter of 2013, up from 0.4 GW during the same time last year, according to a new report entitled “The Photovoltaic Market in Japan” from information and analytics provider IHS Inc. . . “Following the earthquake and tsunami in 2011 that led to the shutdown of nuclear facilities and a shortage of electricity, Japan has aggressively moved to promote solar energy,” said Sam Wilkinson, solar research manager at IHS. “Japan’s government has introduced a highly attractive feed-in tariff (FIT) to help stimulate solar growth.