You seem like a pretty scary person to recommend films to but here goes... I love Oldboy but have heard mixed reviews from others. Don't watch A Tale of Two Sisters it is AWFUL and it doesn't make sense (Sorry Estellio). Ajossi is amazing. Based on your films I'd also recommend 기친, Tony Takitani, Memories of Matsuko (I cannot recommend this one enough), Sakuran, 69, Please Teach me English, and Crush and Blush. You can find 69 on mysoju under Japanese movies.
Oh, but thank you for the recommendations! I’m not scary, I think I’m just bored easily. A Tale of Two Sisters I watch and was on the fence about. Adjussi was great but not a favorite. 기친 I have considered watching MANY times but now that it has been rec’d to me I will try it out~ Along with all these others! Thank you!