The embedded DRAM chip for the Wii U is considered to be the heart of the console and is manufactured at Renesas Electronics plant at Tsuruoka.  Several sources are reporting that Sony is in talks with Renesas to acquire the Tsuruoka plant. This acquisition shouldn’t cause Nintendo too many problems in the short-term even if production of the chip at Tsuruoka were to be halted. In August, Renesas Electronics expected to close the plant due to the sluggish sales of the Wii U, which ultimately caused a decline in production of the chip.

Thanks, Adam