kazuma's samurai heritage is so fascinating to think about when it comes to his actions in dgs2. he's outspoken about workers' and women's rights in japanese society, yet neglects the woman closest to him in favour of a man. he speaks about reform, but he's "a samurai with a mission". he sets out for justice, but he's handed a sword steeped in the traditions of old. he seeks to expose truth, but conceals it from his friend (and sister). he idolises his father, yet criticises ryuunosuke's speech on respecting their forefathers & traditions, despite himself not knowing anything about his own. and even after we complete the game, genshin's motivations remain relatively muddy: he may have enclosed klint's will in his katana, but it's still nonetheless a katana that kazuma inherits; despite taking matters into his own hands in regards to the professor case, genshin still commits murder to put an end to things. even if kazuma resolved himself to obtain justice through legal means, the option of violence rests at his hip every minute of every day.
kazuma's entire life amounts to a metaphorical form of seppuku. like. everything he does is to restore his father's honour, and in choosing ethically dubious ways to achieve this, it plunges him further into a form of social suicide, knowing he'll pay for his actions later. he disregards his own well-being for the sake of his father, he disregards his sister, he disregards his only friend, and in doing so he himself unravels to the point of almost becoming someone he swears he does not want to become.