This study extensively investigates the characteristics of Es layer intensity, spatial distribution, diurnal variation, seasonal patterns, and long-term trends over East Asia, employing over 60 years of observational data from 21 ionosonde stations across China and Japan. The study reveals that sporadic E layer intensity over East Asia significantly exceeds the global average, with its intensity core centered along the 30° N latitude line and attenuating toward both lower and higher latitudes.