The portions of the ride on 413 not fun. 413 has little room for cyclists, fast traffic and trucks that need all the space. Plus the asphalt is rough. But once off 413, the ride is very nice. Nice detour north of Tsukui lake, little/no traffic (Sunday morning) and good elevated view of lake before descent to bridge. Minimal traffic on 513. Pretty church set in middle of valley. Mostly gradual climbs. There was one 7/11 store that many bikers were at... had a nice bike rack for the bikes. Next time I take this route, I'll mark it. If you aren't stocked up on water, make sure to do so before getting on 70. No convenience stores along the route. Once on 70, the road is very nice. 70 parallels the river. Unlike 413, it is too narrow for car or motorcycle racing so you don't have to worry about getting in the way of the speedsters. Just a pleasant, tree lined, nicely paved 1 car width road for some 30km. It is a gradual climb except for portions near Yabitsu toge that are rather steep. After going over the peak, it is a long descent to Hadano. Didn't need to pedal for 30 minutes or more. I put my bike in a rinko bag and was back to my start point in 35 minutes by the Odakyu line. Perfect!