Fare price for bullet train saga to Tokyo?

Hi! I just wanted to know if how much would be the price fare for bullet train from saga to Tokyo? Or do I need to make a booking or reservation in advance.?

Saga means in Kyushu?
http://www.japan-guide.com/e/e8300.html
http://www.hyperdia.com/en/

if so domestic flight cheaper between Fukuoka AP to Haneda/Narita.
http://www.fuk-ab.co.jp/english/timetable/shuppatu.html

also via Shanghai(china) from Saga AP possible.
http://portal.nifty.com/kiji/120307154062_4.htm

Shinkansen station in Saga prefecture is under construction. You must go to shin-tosu station or hakata station to ride bullet train.
http://www.japan-guide.com/e/e2018_kyushu.html

http://www.hyperdia.com/cgi/en/search.html?dep_node=SAGA&arv_node=TOKY...