According to rule 9.11 a convoy line will close if one or both territory at either end is possessed by an Enemy. A closed convoy line cannot be raided.
The Tokyo Line goes to Tokyo, but the other end is in sea zone 122, not any specific island, so it would not be closed unless Tokyo falls, at which time Japan has bigger things to worry about…
@GeneralHandGrenade thanks GHG. I’m going to have to make that assumption as well. I have a feeling it’s a contradiction though, as they mention what you say above specifically in the “Declarations of War” section. But I’d have to go with your assumption, as there would be no point in any kind of truce being signed otherwise.
Do you have any insight to my second question about the use of CCP income?