Update : Apr. 04, 2007
We require trading participants to comply with laws and regulations, and impose a penalty such as fine on trading participants that violated the laws and regulations.
| Date | Trading Participant | Violation | Disciplinary Action |
| March 29, 2006 | J.P. Morgan Securities Asia Private Limited | Series of futures transactions to create an artificial market without any reflection of the actual state of the market | Fine of JPY 25 million |
| March 22, 2006 | Mizuho Securities Co., Ltd. | Insufficient degree of control of electronic information processing system, Violation of just and equitable principles of transactions | Fine of JPY 10 million |
| March 10, 2006 | Nihon Kyoei Securities Co., Ltd. | Insufficient degree of control of order acceptance for prevention of the artificial market | Censure |
| March 10, 2006 | Rakuten Securities, Inc. | Insufficient degree of control of electronic information processing system | Censure |
| July 22, 2005 | Maruhachi Securities Co., Ltd. | Conclusion of a contract to manage a discretionary account  | Fine of JPY 10 million |
| June 30, 2005 | Meiwa Securities Co., Ltd | Conclusion of a contract to manage a discretionary account | Fine of JPY 5 million |
| April 8, 2005 | Aizawa Securities Co., Ltd | A series of transactions to create an artificial market without any reflection of the actual state of the market | Fine of JPY 12 million |
| April 8, 2005 | Aizawa Securities Co., Ltd | Acceptance of a series of transactions to create an artificial market without any reflection of the actual state of the market | Fine of JPY 10 million |