From the viewpoint of preventing sudden price fluctuations, such as caused by erroneous orders, a rule is established to temporarily halt trading, when an order placed will trade beyond a set price range
 from the immediate reference price. This is called the Immediately Executable Price Range Rule.
For more details, please refer to "Immediately Executable Price Range Rule (DCB)".
URL: https://www.jpx.co.jp/english/derivatives/rules/price-range/index.html