The brokerage firm has accepted that its equity sales staff regularly leaked inside information about upcoming stock offerings and then share tips with investors resulting in violation of Trading Participant Regulations.
Nomura chief executive Kenichi Watanabe had stepped down to take responsibility for the scandal earlier this year.
According to current Japanese trading regulation, disclosing secret information gets minor penalty compared to heavy profiting from insider trading.
The exchange has asked Nomura to furnish preventive and corrective measures taken to prevent recurrence of such incidents and also suggested to carry out inspection of the effectiveness of the same.
The brokerage was fined JPY300m ($3.7m) by the Japan Securities Dealers Association earlier this month.
