LogFAQs > #980032261

Alright I will break it down for you. And yeah that Google answer is pretty bad.

Hakusho is the easy part. It's literally white book, but it's the Japanese word for white paper ( https://en.m.wikipedia.org/wiki/White_paper )

Now the Yuu star Yuu star is a little more complex. is like dark or hidden, but also the first part of Yuurei meaning ghost. is like travel or roam, but also the first part of Yuugi meaning game. So to figure out what exactly it means is open to some interpretations.

The Japanese Wikipedia page gives us the best explanation:
[13]

Basically the was indeed meant to be for ghost. And the was chosen for it's use in Saiyuuki, commonly called Journey to the West in English. So something like Ghost Journey White Paper would probably cover it.