We are right next to Yokosuka station. Also we are very close to Shioiri Station. It is about 5 mins walk.
They are different companies ,,,,, JR and Keikyu. Keikyu is operated by private railway operator Keikyu. They have rapid services. If you go to Yokohama or Tokyo, it is faster sometime.
Of course you can use PASMO or SUIKA for both lines!