This has been THE go-to book for me since day 1 of my graduate studies, but I finally sat down and read from page 1 to page 669. Yes, it is a long book, but it is quite readable. Each chapter is sooo thorough! I would say, this is my favorite type of political history -- he always pays attention to Korean and Southeast Asian counterparts, as well as what was going on within Japan, and China in particular. He is also good at switching the focus from nation-wide policies to local histories or individual perspectives. I also learned a lot about what the anti-Japanese Taiwanese forces were doing in Mainland China in this book. It, indeed, feels ironic that their effort to involve the Nationalist China ended up with another phase of authoritarian (and colonizing) rule in Taiwan...
Good news is that there is an English translation already published for you!