If you loved Ronin-gai, try The Assassination of Ryoma
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Kazuo Kuroki, and they sit in Drama territory. If that's the register that drew you to Ronin-gai, the second film will land in a comparable space — through a different lens.
What The Assassination of Ryoma is
Here's a film that finds a lighter side to political murder. It follows Sakamoto Ryoma in the lead-up to his assassination, as he attempts to unite warring clans. The film succeeds as a wry look at a serious subject, but perhaps not as history.

