I’ve never heard of this particular publication, so I’m presuming a good many others aren’t going to know it either. But there is a copy of the All That Mods! Japanese book on eBay right now.
No bids so far, so you might get it for a reasonable price too. As for the book, of course it is in Japanese, dating from 1998 and seemingly a detailing of Japanese mod-realted releases on 7-inch single as well as a breakdown of the mod scene and its style.
According to the seller, this 208-page book is now out of print and ‘extremely hard to find even in Japan’. This copy is also said to be in excellent condition.
Images here and more on the listing. it is up for the equivalent of £20.92 from a Japanese seller who does ship worldwide. Definitely one for the completist.