Unlike the United States or the UK, Japan's tenant and landlord laws look very favorably upon the tenant, rather than the landlord, making evictions exceedingly difficult. As a result, many rental offices in Japan will not rent to an individual without an additional guarantor of funds.
An interesting part of the Japanese culture is the idea that one must pay some amount of money as gratitude towards a landlord for having agreed to rent a room, apartment or home. Usually this amounts to one month's rent.
Tokyo Furnished does not accept any form of key money, or agent fee, nor does it require a guarantor. This is primarily because Tokyo Furnished works with the international community and those who are looking to fill a unique need in renting apartments for shorter-terms than the usual 2-year contracts needed in Japan.