I will leave Tokyo for Kyoto on July 9th (Saturday) around 3:30 pm. I found that Zonomi 45 is leaving at 3:30, and Zonomi 117 at 3:50 pm. Is it recommended to purchase ticket in advance (pros is guaranteed to have tickets, cons is I have to be at station on time) or just buy it when I get to the station right before departure (Pros is I will have some flexibility to enjoy my half day in Tokyo, cons is I may risk not getting the ticket or seat)? Is it you can always get ticket, even on Saturday, for the Shenkansen form Tokyo to Kyoto?
Thanks in advance for any suggestions or advice.