A Japanese hydrating lotion Kiku-Masamune
Kiku Masamune High Moist Lotion
A sake ferment lotion to explore if you want a Japanese hydrating step. Its formula and format differ from SK II Facial Treatment Essence.
Exploring Japanese alternatives to SK II?
A hydrating lotion or a booster serum? Start with the format you want. Neither is a copy of Pitera.
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A Japanese hydrating lotion 
A Japanese booster serum Muji
Muji Fermented Rice Bran Booster Serum
A different format from a watery essence. Compare this option if the Muji booster is the product you are looking for.