To determine if Kojic Acid soap is genuine, there are a few factors you can consider:

1. Brand reputation: Purchase from reputable brands or well-known manufacturers who prioritize quality and authenticity. Look for reviews and feedback from other customers to ensure the product's legitimacy.

2. Ingredient list: Check the ingredient list on the packaging or the brand's official website. Genuine Kojic Acid soap should have Kojic Acid listed as one of the main ingredients. Additionally, look for other supporting ingredients commonly found in Kojic Acid soaps, such as glycerin, coconut oil, or vitamin C.

3. Packaging and labeling: Examine the packaging for any signs of tampering or counterfeiting. Genuine products usually have clear and professional labeling, including the brand name, logo, product description, and usage instructions. Typos, grammatical errors, or inconsistent fonts may indicate a counterfeit product.

4. Scent and color: Authentic Kojic Acid soap often has a light yellow or off-white color. If the soap appears significantly different in color or has an unusual scent, it might be a fake. However, keep in mind that some variations in color and scent can occur due to different manufacturing processes or added natural ingredients.

5. Price: Be cautious of significantly lower prices compared to other reputable brands. If the price seems too good to be true, there is a higher chance of it being counterfeit or diluted.

6. Purchase from trusted sources: To minimize the risk of purchasing counterfeit products, buy from authorized retailers, official brand websites, or well-established beauty stores.

Remember, counterfeit products can be harmful, ineffective, or not deliver the expected results. If you have any doubts about the authenticity of a Kojic Acid soap, it's best to consult with a dermatologist or skincare professional.