The primary reason for the parasite single phenomenon is not economic, as this phenomenon has always existed in Japan. However, the housing costs in Japan are notoriously high, especially in or near large cities. A parasite single who chose to live independently would on average lose 2/3 of his or her disposable income. Furthermore, they would also have to do the cleaning and cooking for themselves. Finally, establishing a household has a large up front cost for durable items as for example a refrigerator, furniture, washing machine, and other items. The security deposit, traditional monetary gift for the landlord (“key money”), and the housing agent fee can also easily reach six months’ rent; this is non-refundable and must be paid in advance. In summary, becoming independent involves large expenses, work, and a significant drop in living standard. Furthermore, as the vast majority of the Japanese population is concentrated in cities, all the employment and entertainment options desired are within reach from the parental home.