explanning

Hello, We are doing a Japan cruise starting and finishing in Yokahoma (Tokyo) this April 2018. We would like to have internet connection but hate to pay the high price for internet aboard the cruise ship. Has anyone had any experience with a pocket wifi (which I will rented and picked up in Tokyo), during their Japan cruise to get internet onboard the ship while cruising? If so please tell me what company you rented the pocket wifi from. We are Canadians. Thank you in advance.