Ichigaya Sadoharacho (市谷砂土原町) is a neighborhood in Shinjuku, Tokyo.
The northern part of the area borders Wakamiya-cho and Ichigaya Funagawara-cho.
The town name comes from the fact that in the Edo period, Honda Sadonokami Masanobu had a villa there and it was called "Sadohara" (佐渡原).
Later, soil was taken from the site of Honda's residence and used for landfill, so it came to be called a sand quarry.
The neighborhood does not have a subway stop but Ichigaya Station is close.