This was a bit of a struggle, and "okay" is all I can really call it. It has a somewhat interesting analysis of what Japanese culture, spirituality, and religion are like, but it leaves a lot to be desired. The second half is dedicated to how we can create a presence of believers in Japan, but it's very abstract in nature and doesn't offer too much concrete example of "this is what my experience has been like." That isn't to say he should have given a prescription of exactly how to proselytize in Japan, but it should have had more concrete examples of what it has been like for him. As it stands, I understand that there is a problem, but what that problem truly looks like is left for me to wonder.
There are also a LOT of spelling, grammatical, and formatting errors throughout, which I really struggled with. Proofreading isn't that difficult.