What is the relationship between Jera and Tokyo in the context of the input sentence. Choose an answer from: 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.

Cann points to some material combinations already formed or in the works, on all sides of the industry: Shell-BG Group on the supply side, Baker Hughes-Halliburton in services, and on the purchasing side, the powerful Jera combination between Tokyo Electric Power Co and Chubu Electric Power Co.

Answer: headquarters_location