I'm pretty sure that's a typo. Look at the specs on the 270mm and 300mm.The photo looks like regular FRKZ, but the spec is interesting, 4.6mm spine on the 240mm and 190g weight, if this is indeed by Ashi Hamono, then they are pretty rare.
https://japanesechefsknife.com/coll...-series-hammer-forged-wa-gyuto-270mm-or-300mm