In the afterword of the GoShogun: The Time Étranger novel, original creator and screenwriter Takeshi Shudo with provides us insight into the public reception of GoShogun as well as his own ideas on what GoShogun is supposed to be about.
If you have not yet watched Goshogun: The Time Étranger, close this window and go watch the movie before reading this. You are doing yourself a massive disservice otherwise.
A couple years back when I was still fairly new to this, I would hear very often that you should read, read, and read some more to really push your Japanese ability further. This is still commonly given advice in Japanese learning circles. I think anyone who's seriously tried to do this has at some point probably faced the frustration of having to look up too many words. Hence what I eventually started to do was pre-learn vocab words contained in things I was interested in, to reduce dictionary look-up burden.