Pay ~$300k for a house in Tokyo, which will cost you +/- $10k down [+] and ~$1k a month for a mortgage. Japanese underwriting standards would consider this doable at a household income of approximately $2.8k a month or so.
[+] I realize that number is surprising, and I would have found it surprising up until ~3 weeks ago, but I can assure you that this product is presently commercially available in Tokyo, including to people who do not exactly smash Japanese banks' definition of "desirable client."
c.f. https://www.youtube.com/watch?v=iGbC5j4pG9w
[+] I realize that number is surprising, and I would have found it surprising up until ~3 weeks ago, but I can assure you that this product is presently commercially available in Tokyo, including to people who do not exactly smash Japanese banks' definition of "desirable client."