Efforts to reduce carbon dioxide in the pavement field are also very important issue to realize decarbonate society. More than 40 million metric tons of hot mix asphalt (HMA) is annually produced in Japan. And about 75% of them are recycled HMA (RHMA). It should be one of the measures to reduce its carbon footprint of HMA if using natural/plant-based binder (NPB), i.e., asphalt alternative. Some NPBs are commercially available. The authors produced RHMA using one of them. And that produced RHMA was evaluated through some laboratory tests, test pavement and so on. Used NPB can be adjust penetration by changing two components from the laboratory tests. And this has similar rheological property as petroleum asphalt. When using this NPB with penetration of 90, produced RHMA shows as similar performance as a general RHMA and shows about twice as rutting resistant performance. This RHMA can be produced at a general asphalt plant and paved with general sets of paving machines. Paved surface is good condition. On estimating the carbon footprint, reduction rate of materials is 38%, that of production is 2% and total reduction rate including hauling is 8% comparing to a general RHMA. One of the biggest challenges is cost, which is estimated about 1.7 times of a general RHMA. This paper shows that such a NPB can be an alternative binder. The authors hope that asphalt alternative can be widely used resulting in lower costs and further this RHMA contributes decarbonated society.