https://business.financialpost.com/pmn/press-releases-pmn/business-wire-news-releases-pmn/toshiba-memory-and-western-digital-to-jointly-invest-in-flash-manufacturing-facility-in-kitakami-japan
 
Toshiba Memory Corporation and Western Digital Corp. have finalized a formal agreement to jointly invest in the "K1" manufacturing facility that Toshiba Memory is currently constructing in Kitakami, Iwate Prefecture, Japan. The K1 facility will produce 3D flash memory to support growing demand for storage in applications such as data centers, smartphones and autonomous cars. Construction of the K1 facility is expected to be completed in the fall of calendar 2019. 
 
"The agreement to jointly invest in the K1 facility marks the continuation of our highly successful collaboration with Toshiba Memory, which has fostered growth and innovation of NAND flash technology for two decades," said Steve Milligan, chief executive officer of Western Digital. "Western Digital's long-term investment strategy for the Kitakami site reflects our ongoing commitment to drive flash technology development and manufacturing along with Toshiba Memory. This expansion positions us well to provide the industry's most competitive flash supply to meet long-term demand trends driven by the growing volume, velocity, variety and value of data."
 
However there is no information whether this will help keep prices at present levels.

Hoggle
I kind of wish they each built a factory themselves. If something happens to that one place both Western Digital and Toshiba are out of production.

Or they have the excuse to charge more.

foundries are very expensive so more joint ventures are likely to be seen looking forward