I am not an apologist, in fact I am on here hating on Delta most of the time, just wondering if this might be a possibility. I am going to assume that you landed on 34L taxied for about 6 minutes and were and the gate making it so you were only 10 minutes late. Due to your flight being late there was no way that Delta could know you would land on 34L. There might have been a good chance since you were on a 76 that NRT had you land on 34R. If by chance you do land on 34R you would have missed by 30-45 minutes easy if not more. My point is not to apologize for delta just to point that there are a lot of factors to take in and you are judging the entire situation by how it ended not how it could have ended.