Utilize the input text as a context reference, choose the right relationship between Japan Post and Tokyo from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

USJ had planned a Tokyo listing this year, but the timing of that has become uncertain due to concerns about being crowded out by the $11.5 billion initial public offerings of Japan Post group companies in November, two sources familiar with the matter have told Reuters.

Answer: headquarters_location