President William Ruto on Thursday evening arrived in Dar Es Salam, Tanzania.
The President was received by Tanzania's minister for Minerals, Anthony Mavunde.
Ruto will participate in celebrations marking the 60th anniversary of the Union of mainland Tanzania and the island of Zanzibar.
State House said his participation underscores Kenya's cherished relationship, good neighbourliness, steadfast partnership and solidarity with the United Republic of Tanzania and its people.