It cost 190 yen for adult. You can take it to see all the sites around the city, although you can't get off (you have to pay every time you get on the bus). It is a good way to get a feel of the city & sites. You can always go back to the sites you want to see & take pictures. The only bad thing about the bus is it only comes every 30 minutes.
If you own or manage Kagoshima City View Bus, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.