Try another DNS, i'm using openNIC dns JP server. God knows what happened to your data at those 4 nodes, last month my tracerout result pointed out a node that reach 500ms ping while at destination it was 80ms. And there're many factors that counted, I'm using cascade VPN ( my pc -> local server->JPserver) and rarely have 630 while connecting directly to VPN JPserver will result in 630 if there is no network activity from game client. I use engpatch with story patch btw, so you can be assured that patches aren't the cause