I don't own any Japanese knives, but the knife makers should be okay. The quake happened off shore, so it wasn't full strength when it hit the land. Many tech factories closed so no damage happened to them. Sony, and Toyota had their factories shut down before the quake hit.
The earthquake and tsunamai appear to have been of such significant magnitude that it will be a long time before we can determine what, exactly, has been affected. At this point, however, we know that many lives and livelihoods have been devastated and recovery will be a long-term proposition.