Accommodation for unaccompanied teenager in Tokyo

I'm a 16-year-old wanting to go alone to Tokyo for three to four weeks, around July. As to be expected, my parents are concerned about my safety while overseas.
A standard hotel is not going to cut it. More precisely, there would need to be a "guardian" or some kind of manager on the spot, someone that would for example: make sure I'm there at night, would be able to give directions or advice about "red-light"/dangerous places in town, be able to call the police if things go down the fan, and be reachable by my parents. Basically, be a link and a guarantee for them.
My first guess would be a youth hostel, but as a kind of "lone wolf" I would rather be in a more private-ish place (a room for one).
Is there any place in Tokyo that offers this kind of service ? If so, could you name it ?
Otherwise, do you think I'm better off looking for homestay or just deal with it and find a hostel?
I've already sent a mail to Sakura Hotels in order to know for them, and I will update if I find anything.
Best Answer
If you want to go the homestay route (which I think would be by far the best in your situation), I have had luck on this site (but maybe that was just luck, I have used it only once).
There is a small fee to be able to send e-mails to potential hosts (probably to cover the website costs), but you only need to do it for the first e-mail, after that they will (hopefully) answer you by e-mail and you no longer need to go through the site. Note that many hosts accept only females.
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Can a minor rent a hotel room in Japan?
Guests must be at least 18 years of age at the time of check-in (although some hotels impose a minimum age of 21 years) unless accompanied by a parent or guardian.How much does it cost to stay in a hostel in Japan?
Hostels typically charge between 2000 and 4500 yen per person and night. Room layouts differ from place to place, but dormitory rooms with double-storied bunk beds are most common. Some hostels also offer Japanese-style rooms with futons laid on the tatami floor.How old do you have to be to reserve a hotel in Japan?
There is no general rule which says minors can't book a hotel room, but that may or may not be what this particular hotel means. Being 19, you shouldn't have any problem. A hostel I stayed at years back, there were a few 17 year olds staying there solo.Can you enter a love hotel alone?
Love hotels are also great places to stay if you are a woman traveling alone. As mentioned earlier in the article, the cost for a few hours' stay can be up to several thousand yen, while an all-night stay is typically around \xa510,000 depending on the location.Inside a TYPICAL Japanese Apartment [NOT in Tokyo]
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Images: John Lee, Karolina Grabowska, cottonbro, Karolina Grabowska