Joshua Koshiba (born 10 December 1943[1]) is a former member of the Senate of Palau.
After his re-election in 2004, he became the longest-serving member of that body in the history of Palau.
[3] On 27 March 2007 he was elected as President of the Senate to succeed Johnny Reklai, who had died in a boating accident.
On 25 April 2007, Surangel S. Whipps was elected to succeed him as Senate President.
[4] In 2008, he announced his intentions to run for President;[5] however, he withdrew his bid following defeat in the primary race.