Kodama is one of the three train services running on the Tōkaidō and San'yō Shinkansen lines. Stopping at every station, the Kodama is the slowest Shinkansen service for trips between major cities such as Tokyo and Osaka. The Kodama trains are used primarily for travel to and from smaller cities such as Atami. Travelers between major cities generally take the Nozomi or Hikari services, which make fewer stops, although the former isn't covered under the Japan Rail Pass while the Kodama is, making these services an affordable alternative.

Hikari is the name of a high-speed train service running on the Tōkaidō and San'yō Shinkansen "bullet train" lines in Japan. Slower than the premier Nozomi but faster than the all-stations Kodama, the Hikari is the fastest train service on the Tōkaidō and San'yō Shinkansen that can be used with the Japan Rail Pass, which is not valid for travel on the Nozomi or Mizuho trains except through a special supplementary ticket.