Unfortunately, it was not only entirely predictable, but virtually certain, due to drastic, though well advertised in advance, sales tax increase from 5% to 8% in April, and the prospect of another increase to 10% next year (now virtually guaranteed to be rescinded or delayed) contrary to analysis by most economists and financial "experts" who were probably too drunk watching Nikkei 225 rising to hit seven-year high.
Unfortually, what Abe and Aso are doing to fight the three decades-long cycles of deflation and recessions is nearly classic Keynesian "solution" to the government-created in the first place Keynesian problem - more debt-accruing fiscal and monetary stimulus from the government, and austerity regime for the people (quite similar to what's going on in the most of EU countries).
Sharp broad tax increase with a (finally) a whiff of low inflation combined with the stagnant wages had a very predictable effect on the economy. Abenomics needs adjustment, hayai (車い) .
“Unfortually” = unfortunately. Sorry for the typo.