My commute is 50km (31 miles) round trip and I try to make the trip 3 to 4 time/week.

The route goes from the Yokohama suburbs into central Tokyo. About 30% is flat and the rest is very hilly. There's a 2 wheel traffic lane (that none of the divers respect) for part of the distance.

Bike is a 20 year old Nishiki Professional frame that I got in new condition a few years ago and built up with Suntour Superbe Pro parts just after Suntour went out of business. Look 286 pedals, Flite saddle. Not a bad road bike at all but it makes coming back to my Cinelli on the weekends feel great.