(Bloomberg) -- Japan’s biggest brokerage has started offering subscriptions to a luxurious Italian food delivery service, where customers can use security tokens to buy and trade dishes as their value fluctuates. An affiliate of Nomura Holdings Inc. on Wednesday began selling the tokens, that exist on the blockchain, for four high-end food parcels a year from Masayuki Okuda, an award-winning Japanese chef famous for using traditional local ingredients like olive-fed beef and zusayama chicory. Ow