Carl:
You'd probably be better off taking a train...faster...However, be prepared to pay airline type fares on Shinkansen...By car, the tolls along the way are almost the same...plus Gas was $4+ a gallon in '98 hate to see what it would be today...If your new breeder buddies don't have a place for you to stay figure on at least $50/night/person at at guest house or 150/per/night at a hotel, if you can find one...
If you drive to the H1-H2 intersection in Ewa each weekday morning at around 6:30-7:00am for about a month, it'll get you ready for Tokyo traffic...Or you can go to a full parking lot, park your car, and sit there for 1 hr...it's about the same....
Lived in Denen Chofu, on the Tamagawa, drove to Kamakura most weekends to surf, about a 45min drive...Tolls were US$15 each way and cheap parking at at the beach was $20...If waves were pumping, cost was $100 a weekend. lucky we live Hawaii...
Aloha! Mike T