In that case, no point in offering up Noriko's Dinner Table if you haven't seen
Suicide Club, NDT being the sequel/prequel/parallel story. Suicide Club is a decently well known film, but the sequel adds all kinds of layers to the narrative, doesn't get near as much love. Honestly, anything by director Sion Sono is worth a watch. He's really made a name for himself over the last 25 years or so.
Conversely to yourself, I only recently started sitting down and watching Kurosawa (though I did watch Yojimbo many years ago, now). I came up on kaiju and anime, my love for Japanese cinema grew organically out of that.