This a tiny snippet from a Morgan Stanley piece, they see August 2018 for a return toward a lower US dollar

Specifically citing the 'twin deficits':

MS' forecasts ahead are divided into a bear case, a base scenario, and a bull case. Sort of like a range. These out to Q2 of 2019 (i.e 12 months out)

USD/JPY

  • Bear 88
  • base 96
  • bull 101

EUR/USD

  • Bear 1.18
  • base 1.24
  • bull 1.30

GBP/USD

  • Bear 1.32
  • base 1.39
  • bull 1.50

AUD/USD

  • Bear .67
  • base 0.71
  • bull 0.75

--

The USD/JPY forecasts are very bearish indeed.

MS expect specifically on the yen:

  • A flatter US yield curve and higher asset volatility in 2H18 reduce incentives for Japanese investors to invest abroad. Repatriation of funds into JPY-denominated assets should keep JPY supported.