Hada Labo Shirojyun Premium Whitening Lotion

The regular Shirojyun (light blue bottle) contains alpha arbutin as the brightening active. The Premium version (dark blue bottle) uses tranexamic acid instead. Tranexamic acid is a newer ingredient with strong clinical evidence for preventing melanin production and is often prescribed in Japan for melasma. Both are excellent, it's just a different active approach.

It's a toner in the Japanese skincare system, applied right after cleansing on damp skin. The texture is thicker than Western toners (almost serum-like), but it's meant to be used the same way: pat it on with your hands or a cotton pad before moisturizer. The Japanese call this format 'lotion' but it's not a moisturizer.

Yes. Tranexamic acid and vitamin C work through different mechanisms and complement each other well. Many people on r/AsianBeauty use Shirojyun Premium as their toner, then apply Melano CC as a spot treatment. Tranexamic acid prevents new pigmentation, vitamin C brightens existing spots.