札幌国際ハーフマラソン
At the 2005 Sapporo Half Marathon, he led for the first half of the race but had faded to fourth by the finish point. At the end of the year he represented Kenyan in the International Chiba Ekiden. Running the marathon distance with a relay team of Martin Mathathi, Daniel Mwangi, Mekubo Mogusu, Onesmus Nyerere and John Kariuki, he helped set a world record time of 1:57:06 hours for the popular Japanese event. Ndambiri won a second Chiba Ekiden title with Kenya the following year, where he won his 5-kilometre leg by a margin of over twenty seconds.