Fujitsu commented that the reports are not based on any announcement it has made and that it doesn't intend to withdraw from semiconductor fabrication. However, Fujitsu has been seeking partners as one element of its ongoing restructuring.

Fujitsu and UMC reportedly intend to form a JV, with Fujitsu initially having a majority stake but eventually reducing that to a minority stake, in order to separate the fab operation from its consolidated business results.

Back in February 2013, Fujitsu announced its intention to form a JV with partners, including TSMC, for semiconductor fabrication at the Mie fab. But negotiations with TSMC appear to have been unfruitful.

Related link:
Regarding a Certain Media Report

Related articles:
Fujitsu and Panasonic will form fabless SoC JV (Apr. 24, 2014)
Semiconductor fab reorganization (Jan. 7, 2014)
Fujitsu selling microcontroller/analog business to Spansion (May 2, 2013)
Will Fujitsu & Panasonic's SoC integration bring forth a "Japan foundry"? (Feb. 22, 2013)