I flew to Tokyo from East Coast US approximately 9 times from 01/2016-03/2017...and not once was I upgraded...and I was crediting all those flights to JL. So as others have said, I wouldn't hold my breath for any upgrades. I didn't have much luck clearing upgrades to J with miles either, as there are many others with higher status.
This was partly why, in the latter half of 2017, I impulsively spent my 100k miles on a Y award ticket, and a one way JL F ticket from NRT to JFK. This meant I couldn't renew my Crystal status, and I had to look elsewhere via a status match T_T