I did a search but couldn't find a thread about him. I thought it was weird because of of his rather big role in Iryu so I hope I'm not wrong.
I personally think Abe has real acting talent and he's become one of my favorite actors. His Arase Monji in Iryu gives me the chills (not in a bad way), he's just so intense. Another memorable role I think was in Kisarazu's Cat Game. He perfectly nailed that type of guy you just love to hate, in my opinion.
Hope there are some fellow Abe Sadao fans out there!