Today, it's free and takes only five minutes. But getting to the other side of JR Shinagawa Station was once no easy matter.
Walk 30 minutes or more or buy a 130 yen JR entry ticket for the quick way out through the station -- those were once the only two options available to those who mistakenly took the wrong exit the first time around.
The free "shortcut" had been over Yatsuyama bridge -- roughly 600 meters to the south of the Takanawaguchi Exit west of the station along National Route 15 and an even longer, deviated walk from the Konanguchi Exit on the east.