Enough time to change trains?

Both are not small stations, but not huge either. 15 minutes should be enough time if you know which platform to go to.

Hi there,

Making a Shinkansen to Shinkansen transfer is easy most of the time. This because each station has a special Shinkansen section and you stay within this area. Generally it means going down one escalator and up the next. So transferring at Shin-Kobe should be no problem.

The transfer at Shinagawa will be more tricky because you will have to go from the Shinkansen tracks to the normal rail services. First exit the Shinkansen area via the Shinkansen ticket gate, from there make your way to the normal tracks. The Narita Express usually departs from track 13. A full station guide can be found here by Takeshi. About 5 minutes should be enough though to make the transfer.

Hope this helps,
Daniel