Japanese is the only script I'm familiar with (other than Latin), and it's very clear to me that the person who drew the hiragana characters in this book wasn't familiar with them as they only vaguely resemble the actual characters. I wonder if there was a bit of a "game of telephone" effect going on too, as the book cites a French encyclopedia as its source, which may also have contained non-native renditions of those characters.
It's also interesting how they refer to the language as Japonese instead of Japanese, which makes sense if they their source was a French encyclopedia, but I wonder if Japan was being referred to as Japon in English too back then.