There is an obvious difference in color, concentration and taste of 'soba-tsuyu' (dipping sauce or soup for soba) and 'soba-jiru' (dipping sauce or soup for soba), the seasoning for soba, depending largely on whether it is made in the eastern or western part of Japan.
この蕎麦の調味として作られる「蕎麦つゆ」や「蕎麦汁」は、主に西と東では色・濃さ・味になどに明らかな違いがある。