ED I ) ▁was ▁under ▁development . ▁ ▁Use ▁in ▁F uk ush ima ▁D ai ichi ▁nuclear ▁dis aster ▁ ▁The ▁government ▁recommendation ▁that ▁people ▁volunt arily ▁ev acu ate ▁from ▁places ▁in ▁the ▁ 2 0 – 3 0   km ▁range ▁from ▁the ▁F uk ush ima ▁D ai ichi ▁plant ▁came ▁after ▁the ▁N uc lear ▁Saf ety ▁Commission ▁watch dog ▁released ▁forec asts ▁based ▁on ▁S PE ED I ▁measurements . ▁ ▁It ▁was ▁found ▁that ▁radiation ▁levels ▁differ ed ▁significantly ▁based ▁on ▁ge ography ▁and ▁wind ▁direction , ▁and ▁it ▁was ▁suggested ▁that ▁because ▁of ▁this , ▁the ▁way ▁ev acu ation ▁areas ▁were ▁being ▁designated ▁should ▁be ▁changed ▁and ▁become ▁more ▁detailed . ▁ ▁The ▁Y omi uri ▁Shin b un ▁calculated ▁radiation ▁dos es ▁based ▁on ▁data ▁from ▁the ▁F uk ush ima ▁pre fect ural ▁government ▁and ▁found ▁they ▁correspond ed ▁with ▁the ▁forec asts . ▁ ▁S PE ED I ▁figured ▁in ▁controvers y ▁surrounding ▁the ▁Japanese ▁government ' s ▁use ▁of ▁the ▁data ▁and ▁its ▁failure ▁to ▁use ▁it ▁in ▁planning ▁ev acu ation ▁routes . ▁ ▁Data ▁on ▁the ▁dispers al ▁of ▁radio active ▁materials ▁were ▁provided ▁to ▁the ▁U . S . ▁forces ▁by ▁the ▁Japanese ▁Ministry ▁for ▁Science ▁a ▁few ▁days ▁after ▁March ▁ 1 1 ; ▁however , ▁the ▁data ▁was ▁not ▁shared ▁with ▁the ▁Japanese ▁public ▁until ▁March ▁ 2 3 . ▁ ▁According ▁to ▁Wat an abe ' s ▁testim ony ▁before ▁the ▁Diet , ▁the