Japan Oil, Gas, and Metals National Corporation - (JOGMEC) maintains the Rare Metals Stockpiling Program (RMSP). Conceived after the oil crisis of the 1970s, the RMSP was implemented in 1983 with materials stored at a 37,000 cubic meter warehouse
facility in Ibaraki Prefecture. According to JOGMEC, RMSP maintains stocks equivalent to 42 days of
standard consumption (JOGMEC 2014a and 2014b). It is not clear which rare earth metals are stored at
the RMSP facility but industry observers have maintained that Japan does stockpile rare earths.
see page 42
http://www.rand.org/content/dam/rand/pubs/rgs_dissertations/RGSD300/RGSD337/RAND_RGSD337.pdf
