2022 Japanese animated film by Takehiko Inoue

In the year Universal Century 0079, humans have colonized the area of space lying in between the Earth and the moon. However, the ambitious Zabi family, rulers of the Duchy of Zeon, the grouping of colonies furthest from the earth, has sparked a war.

2001 Japanese anime film by Shin'ichirō Watanabe

明治政府建立二十余年，新时代虽已来临，却似乎与人们心中——尤其是维新志士心中的那个理想国度相差甚远。国家仍处在大时代的动荡惶恐之中，战争的阴影仍笼罩在日本的上空。
当年的浪漫剑客如今纷纷尘埃落定：弥彦成长为正直善良的剑客；左之助也少却了青春孟浪，变得沧桑；剑心的儿子剑路同样拜入比古清十郎的门下，誓要成为绝世高手，却与父亲分外隔膜；剑心接受政府的任务赶赴大陆战场，为了赎回前半生的罪过而疲于奔命，逆刃刀从此封存，家中只留下病弱的阿薰苦苦等待。
这不再是关于明治剑客的浪漫谭，这是一个英雄迟暮的哀婉诗篇……

2018 film directed by Takuya Igarashi