Offhand katana doesn't add skill for starters
Can't tell you if you were really 121+ or not from the post. You need 110 + stall + hat + apron + katana + Torque/Support/Shield
(yes, the hocho is nerfed offhand even though it doesn't say it)
Make sure you
actually have MM: Cooking, pretty much any furnishing will overwrite it, then make sure you actually have 121 skill