@Patrick613
A rental lease means the renter pays for all utilities and internet. Also prices differ depending on whether it is furnished or not. I'm sure most studio apartment rentals don't provide any towels, bedding, or amenities. I don't know what rental prices or real estate is like in Japan but just based on my limited knowledge of renting in Asia in general, considering all the things which would normally be inclusive in an ABB listing, 585$ a month for a studio (even if it's not a central location) with internet/wifi and utilities all inclusive still seems like a really good deal.
FYI, in Korea for a NOT central location, a normal, clean, furnished studio rental would require a min. 10,000$ deposit and 450$ rent per month - utilities and internet not included (utilities & internet would cost at least 120$ a month.) For a central location in Seoul it's more like a 20,000$ deposit and 1,000$ rent per month. Also, even these furnished places would not provide any bedding, towels or amenities (plates/cups/utensils/pots/pans/shampoo, soap etc.) I don't know how Japan and Korea differ but I would assume it isn't all that different.
I was told that places that cater to foreigners (in Korea) tend to have higher rents because they are asked to provide more amenities, ovens (which are not common in Asia), and often need to find someone who speaks English to help with communication about resident rules, trash disposal, and when there's an issue.