Utilize the input text as a context reference, choose the right relationship between Fugaku and RIKEN 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.

For example, in the field of computing, the Supercomputer Fugaku we jointly developed with RIKEN achieved the top ranking in the world in four difference measures of performance.

Answer: developer