The 1988 anime film Grave of the Fireflies is currently available to stream in high definition on Netflix India
Report: Grave of the Fireflies (1988) - A Powerful Anti-War Drama grave of the fireflies 1988 hindi dubbed full extra quality
Regarding the Hindi dubbed version, I found that there are various sources that provide information on the film's availability in different languages, including Hindi. However, I couldn't find any reliable sources that confirm the existence of a high-quality Hindi dubbed version from 1988. The 1988 anime film Grave of the Fireflies
In the "Extra Quality" Hindi version, expect: including Hindi. However
Availability: Unofficial Hindi dubbed versions can be found on platforms like Facebook and Lykstage .