According to the JR Tokai website, one-way Shinkansen tickets between Shin-Yokohama and Kyoto are 12,420 yen (non-reserved seat) (about $115), 13,250 yen (reserved seat) and 18,030 yen (luxurious Green Car seat).
At about $230 per round-trip, traveling to Kyoto via bullet train is not cheap! But don’t forget to check your local ITT office or travel agencies for package tours that can cut the cost and also include a hotel stay.
I booked our tickets through JTB, a well-known travel agency in Japan, and paid 21,000 yen ($190). The package included round trip Nozomi Shinkansen tickets and a room at a great hotel that was only a 2-minute walk from Kyoto station.
If you have visitors from out of town, I suggest they purchase a JR Rail Pass. This is a special pass exclusively for those on tourist visas. The pass covers most bullet trains and the nation-wide JR railway service. The tickets range in price from around $300 to $400 per week and need to be purchased in advance. Visit https://global.jr-central.co.jp/en or call at 050-2016-1600 for more information.