Hello,
My family of 5- youngest 12 yr old so all adults (?) are traveling to Chiba on March 10,2018 and we are planning the following itinerary:
Chiba-yokohama: March 10
Yokohama-Chiba: March 11
Chiba-Kyoto: March 13
Kyoto-Hiroshima:March 15
Hiroshima-miyajima: March 16
Miyajima-hiroshima: March 16
Hiroshima-Tokyo: March 17
Tokyo- Narita: March 18
Could you please give me the most optimum estimate for these trips for 5 people?
Also I would appreciate to have a Shinkansen ride if no additional cost is expected?
Will it be additional cost to get reserved seats?

