My wife is Japanese. We have four half-Japanese kids. I took six Japanese language classes at UMUC Asia back in the day. I aced them all. I went to a community center in Hachinohe, Japan to study Japanese for roughly three years. Despite this, I was too busy chasing girls (i.e. my wife) and focusing on other college work to really hunker down/study up at the time. I learned a lot. However, I wouldn't say I was as focused as I could have been. I passed the JLPT Level 4 at the University of Tokyo Komaba Annex back somewhere between 2002-2005. When I left Japan in 2006, one of my teachers from Hachinohe gave me this book as a present. It's time for me to lock myself in a room and work through this damn thing. That's what I'm doing. I need advanced material to become fluent. I'm hoping to push myself closer to fluency with this book. By fluent, I mean really fluent. I can easily get around on my own in Japan and do anything. However, I can't really engage in complex conversations in Japanese; I've got about a sixth grader's vocabulary.