Pros
Hitachi was a great place to start learning. You get a lot of freedom - maybe too much and ability to write your own path a bit. I loved the people I worked with and that was absolutely the best part - that being said make sure you "creating" your own path is the "right" path.
Cons
Otherwise you'll be let go. There have been rounds of layoffs since 2016 and it's been confirmed that another recent round 2019. The company is struggling financially and this "new vision" clearly isn't working. In order to meet operating income responsibilities to corporate Hitachi Consulting has resorted to taking the easy way out and firing people. Between layoffs and pay/budget freezes who knows anymore. It's not sustainable and not growing. Beware. Go find a consulting firm that is! There are plenty of them.