Chikyuu ga Ugoita Hi

Futatsu no Kurumi - Children facing the devastation, death, and loss as a result of USA firebombing Tokyo during WWII. 

Both are drama based on real earthquake disasters in Japan and portray how it affected the victims. 

Both animes relate to earthquakes. I found The Day The Earth Moved is a lot more realistic than Japan Sinks 2020, because Japan Sinks 2020 is more on the sci fi side.  

Ushiro no Shoumen Daare - Children facing the devastation, death, and loss as a result of USA firebombing Tokyo during WWII. 

Children dealing with the devastation, death and loss resulting from the 1995 Kobe earthquake.  

This one is a look at tragedy and disaster from the perspective of the helicopter pilots and rescue teams of the Japanese National Defense Force.  

Hadashi no Gen & Hadashi no Gen 2 - Children facing the horror, devastation, death and loss resulting from an atomic bomb dropped on Hiroshima in 1945. 

Both are about children experiencing loss and survival after a massive earthquake. While Tokyo Magnitude is a hypothetical disaster, Chikyuu ga ugoita hi (The Day the Earth Moved) is about children who survived the great hanshin earthquake that happened in Kobe in 1995. The art may be ancient, but it was still very touching.