Me, Setsuko (Grave of the Fireflies), 3024 x 4032 : r/ArtPorn

Grave of the Fireflies - Where to Watch and Stream - TV Guide

Poster of Studio Ghibli's Grave of the Fireflies(1988) : r/Art

Review: Isao Takahata's Grave of the Fireflies on Sentai Blu-ray

Real life Grave of the Fireflies [from /r/HistoryPorn] : r/movies

If you look closely at the poster of Grave Of The Fireflies (1988), you can see that some of the glowing lights aren't actually fireflies but bullets or bombs being thrown by

Grave of the Fireflies (1988) : r/MovieQuotes

Studio Ghibli's Classic 'Grave Of The Fireflies' Returning to Theaters This Week : r/movies

Grave of the Fireflies (1988) poster : r/AnimalCrossing

Grave of the Fireflies if you're curious : r/Animemes

Disney and Studio Ghibli's long, ugly history, explained - Polygon