There is no direct bus to Mt. Fuji 5th station until the middle of July.
However, there is a bus which goes to Mt. Fuji 5th Station via Kawaguchiko from April 29 to the middle of July exclusively.

Please reserve a round trip ticket from Shinjuku to Kawaguchiko online, and then change the destination to Mt. Fuji 5th Station when you pay for the ticket at the ticket counter in Shinjuku Expressway Bus Terminal.

For the customers who would like to go to Mt. Fuji 5th station, please reserve the following bus.
(Please note that not all the buses bound for Kawaguchiko go to Mt. Fuji 5th station.)

[Depart] Shinjuku 9:45 → Kawaguchiko 11:30 → Mt. Fuji 5th Station 12:20
[Depart] Kawaguchiko 15:50 → Shinjuku 17:35
[Depart] Kawaguchiko 17:50 → Shinjuku 19:35
* The travel time from Kawaguchiko to Mt. Fuji 5th station is approx. 50 minutes.

The departure time from Mt. Fuji 5th station will be printed on the bus ticket, so please make sure to issue a round trip ticket when you purchase your ticket at Shinjuku Expressway Bus Terminal.

Reserve for Kawaguchiko