|As of April 2003, there were 33 river systems in the city of Osaka totaling
approximately 146.4 kilometers in length. The municipal government is
responsible for the management of six Class A River Systems, four secondary
rivers, and four regular rivers. With respect to the Shirokita River,
a Class A river system managed by the governor of Osaka Prefecture, the
city of Osaka has undertaken construction and maintenance work pursuant
to Article 16.3 of the River Law and certain management tasks pursuant
to Osaka prefectural ordinances.