Prior to the launch of the Gold Daily Futures contract on May 7, 2015, the Exchange commences disseminating the theoretical spot price that works as settlement price of trades in the TOCOM website today.
The theoretical spot price is to be calculated based on the settlement prices of the Gold Standard Futures contract and disseminated once a day before May 7. From that day onward, the theoretical spot price will be calculated with 5 minutes interval during the sessions based on the prices of the Gold Standard at that time and disseminated in the Exchange website.
[ Reference Page]
Market Data> Quotes for Individual Products> Quotes for Gold (Daily Futures)
http://www.tocom.or.jp/souba/d_gold/index.html
Market Data> Quotes for All Products by Trade Date> Gold Daily Futures
http://www.tocom.or.jp/souba/all/index.html