Japanese version by user:nyampire
The default Bing imagery for Japan is poorly orthorectified throughout the country. Here we see some sections of the Shin-Tomei Expressway where the distortions are very clear.
Comparison of Bing and Orthorectified GSI imagery near Fuji
The correct imagery to use in Japan for tracing is from the Geospatial Information Authority of Japan (GSI) and the tileurl is http://cyberjapandata.gsi.go.jp/xyz/ort/{z}/{x}/{y}.jpg which can be used with source=GSImaps/ort
Spotted while correcting roads in Japan. Join the task to realign the data here: http://tasks.teachosm.org/project/104