No great loss there - I was never happy with him during his Astros tenure. He got off to a bad start after the Astros acquired him before the 2008 season, when he ended up on the DL following surgery that he would probably have preferred unmentioned. He hit .293 for the season, but only logged 96 games due to injuries.
If anything, the best thing about Kaz was the presence of his two aids (a trainer and a translator) who trotted around with him at Spring Training, dressed in matching red and black costumes. I know it's awful, but I couldn't help referring to them as Thing 1 and Thing 2.
So it's back to Japan for Kaz. I don't know what will happen to Thing 1 and Thing 2 - he won't need a translator back in the old country. As for me, I've moved on to my own version of Thing 1 and Thing 2.