Bloomberg reports that Nikon is currently discussing with Notion Vtec the possibility of relocating some of the production from Sendai to Malaysia.
Back in January of 2010 Nikon made a major investment in Notion Vtec (Nikon acquired 10% of the company).
Notion Vtec produces the following SLR components (from their website):
Nikon plant in Sendai was closed a week ago after a massive earthquake and tsunami devastated the area. The factory in Sendai produced the high end Nikon DSLR cameras like the D700 and D3s.