I had assumed that Japan's nuclear power plants were all fairly new.
But the plant which is melting down now - Fukushima I  - is actually 6 years older than Chernobyl, having been commissioned in 1971.
The Fukushima I was built by GE, not the Japanese.  (Toshiba and Hitachi built some of the other reactors at Fukushima, but not the one that is melting down).