As a Japanese, I find this small book to be very accurate and informative. The procedure and the idea behind Japanese bath taking is clearly explained, without the oft-found orientalism. This is exactly the bath taking manners that our parents teach their kids (well, at least they are supposed to).
Another great point about this booklet is the artist, Maruo. He is the Dario Argento of Japanese comics, known for his extremely detailed and beautiful drawings of the grotesque. In this book, you'll find a lot of very pleasant drawings about Japanese bath taking, but to the people who are used to his normal works, you sort of expect some blood, gore, beheadings and freakshows that are Maruo's signature themes at every turn of the page. Whether that expectation was satisfied was... I'll leave it up to you to find out.
Highly reccomended. Informative to non-Japanese (and the younger generation Japanese --- you kids have no idea how to properly take a bath these days, shame on you), and enjoyable to Japanese.