I don't think it's expensive, but then again I'm comparing it to train prices in Northern Europe, which is just painful. There, I'm used to pay for the ticket through gritted teeth. In Japan I can pay for a ticket + limited express (better train w/booked better seat) for a 45 minute ride for what I would pay for a pint of beer at home. Totally worth it. The Shinkansen for a 90 minute ride is not cheap, say ten beers.. Northern Europe beer prices, mind.