All is set for the commencement of the Blue Economy conference set to start Monday and end on Wednesday.
The government says 180 countries have confirmed attendance.
The Sustainable Blue Economy Conference (SBEC) is the first global conference on sustainable blue economy.
It aims to harness the potential of oceans, seas and rivers to improve lives.
Organisations that have pledged support for the SBEC include Food and Agriculture Organisation (Sh10 million), United Nations Development Programme (Sh10 million) and the Ocean Foundation (Sh150 million).
The conference, co-hosted by Canada and Japan, will include side events such as research and science symposium and a business and private sector forum. More than 60 exhibitors will also be in attendance.
Speaking at a Nairobi hotel on Tuesday, Foreign Affairs CS Monica Juma said 11,571 delegates will be participating.