Yes! It can be done, you can catch a bus really early (around 6:30 am) from Shinjuku. Arrive to kawaguchiko station and then catch a train to Shiniyoshida Station. Then go back to kawaguchiko station and go back to Tokyo. I... More
Yes! It can be done, you can catch a bus really early (around 6:30 am) from Shinjuku. Arrive to kawaguchiko station and then catch a train to Shiniyoshida Station. Then go back to kawaguchiko station and go back to Tokyo. I believe you can grab a train all together, but I didn’t consider that option cuz it was very expensive. I think that, if you can, it is worth staying at least one night by Kawaguchiko Lake. But it can definitely be done in one trip. Also, I believe there are some tours that offer a one day trip from Tokyo. Hope this helps.