i just came across this website http://keepright.ipax.at/
tip: when u go to the asia link, uncheck all the errors on the left so the map will load faster
http://keepright.ipax.at/report_map.php?zoom=14&lat=35.68051&lon=139.76404
here is one it located. hover mouse over the error symbol on the map and u will see more info on it.
with that info i can also use osm browser to locate the exact problem node
