Utilize the input text as a context reference, choose the right relationship between back on 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.

TOKYO Aug 19 The yields on long-dated Japanese government bonds bounced back on Wednesday after their fall to 3-1/2-month lows triggered profit-taking in volatile trade.

Answer: location_of_formation