If you want to see the beautiful Mt.Fuji,I would suggest to go to Yabitsu Toge pass in Tanzawa area.The route to Lake Yamanaka from Yabitsu Toge Pas via Doshi michi is the best route for half day riding from Tokyo.
Getting off at Hadano-nakai on Tomei expressway,you will find the road sign to R70 easily.Riding for a while, You will see the Yabittsu Pass in front of you.
Almost no traffic lights, you can enjoy nice winding road
Climb up the Yabirsu Pass for a while,there is the Nanohanadai observatory near the top.
Stop the bike and take a break here
You can see the big Mt.Fuji and Hakone mountains.it’s fantastic
If you only have one day in Tokyo and want to see the beautiful Mt.Fuji with motorcycle, here is one of the best route.