Is intercessionary prayer prohibited in Jodo Shinshu (Japanese Pureland?)

So I just read "Waking the Buddha" by Strand and he had a comment: "It is unlikely that those who attended them would have felt within their rights, to demand that the Jodo Shinshu teachings showed practical application in daily life. In fact, the prohibition against intercessionary prayer in Rennyo 's tradition would have argued against it." In Jodo Shinshu, can one efficaciously pray to the Amida Buddha for some result in this world?