Train Times and If covered by JR Pass

Hi,

My boss is making the following train journey:-

15th September - Tokyo to Nagasaki
(Bus ticket from Hakata station to Nagasaki - 11:21am)

20th September - Nagasaki to Hiroshima
(Bus ticket from Nagasaki to Hakata 10:42)

21st September - Hiroshima to Tokyo

He has a JR Green Pass so could you please confirm that he can use the pass on all routes. What are the train times on the routes and please and can he use the Nozomi train. If not, can he buy a supplementary ticket?

Many thanks,
Joanna.