However, there are only few hot springs which have both sodium bicarbonate suited for making soft and full dough, and steam of high temperature required for steaming, therefore many of the manju called Onsen-manju are normal manju just as a souvenirs.
しかし、ふっくらした生地を造るのに適した重曹成分や蒸しに適した高温の蒸気が確保できる温泉は限られており、多くは単なる土産物としての饅頭である。