In Japan, across 11 cities, in the quarter century (1974 - 1998) the days of thunder and lightning were confirmed on an average 180 days annually. However, in the quarter century (1999 - 2023) the lightning incidences increased by 16.3% to 209 days per year according to the Nihon Keizai Shimbun's analysis of the Japanese Meteorological Agency's 50 years of data released by Yonhap News agency.