This is a commemorative booklet issued by Daikanyama Ogawaken. It's thick, like a pamphlet, and not a commercially available book. I obtained it through my close relationship with Monsieur Ogawa. It's over 10 years old, so I don't remember, but I think it was distributed only to family and close acquaintances. I've forgotten whether I purchased it or received it as a gift. It's packed with 80 years of Ogawaken's history, so it's recommended for those interested in Ogawaken.