Chapter II Cooperation with the International Criminal Court
Section 2 Provision of Evidence, etc.
Subsection 1 Provision of Evidence
(Measures by the Minister of Justice)
Article 6 (1) (v) when complying with the request for cooperation would risk obstructing an investigation or trial in a case that is connected with a crime other than the offense underlying the cooperation request, and that is being investigated by a Japanese public prosecutor, public prosecutor's assistant officer, or judicial police official or is pending before a Japanese court, and the Minister of Justice finds it unreasonable to immediately comply with said request;
Postponement of execution of ICC request
Postponement - ongoing investigation or prosecution
EDIT.