The Aomori Nebuta Festival is a summer festival that lights up the Tohoku region, Hitachi has participated in the festival for over 50 years. This year Hitachi's nebuta (float) was lit by solar-powered energy. This was the first time that Hitachi entered a solar-powered float in the historic Aomori Nebuta Festival. This article covers Hitachi’s challenge of realizing a solar-powered float.