Volunteers from the executive committee of “The Final War at Sekigahara, Ogaki Exhibition” held in Ogaki City in 2000 set up the “O-kaki Project Executive Committee” and are promoting the Kaki Tree Project to elementary schools and junior high schools in Ogaki City. After planting the trees in the park of Ogaki Castle, Ono Elementary School and Higashi Junior High School in 2000, they planted 4 more trees in 2001 and 8 more trees in 2002 in a place such as Kita Junior High School, Kita Elementary School, Nakagawa Elementary School, Kawanami Elementary School, Aohaka Elementary School, Seiwa Junior High School, Pacific Industrial Co., Ltd., Seino Transportation Co., Ltd. .
On the 10th of October 2009, to celebrate the 10th anniversary of the first tree planting, the festival “O-kaki Chorus with a Theme -Bond-” was held and a huge chorus of 3,000 people consisted of children, students and adults from the city sang together.