Translation guide
In Japanese, 'hair oil' is commonly referred to as ヘアオイル, a loanword from English. There are also traditional Japanese hair oils like 椿油 (camellia oil). The choice depends on the type of oil and context.
Refers to modern hair oils used for styling, conditioning, or treatment, typically sold in bottles.
The most common and direct translation, widely understood in Japan. Used for various types of hair oils, including argan oil, coconut oil, etc.
This hair oil makes your hair smooth.
Camellia oil, a traditional Japanese hair oil. Often used for hair care and known for its moisturizing properties.
My grandmother applies camellia oil to her hair every day.
A generic term for hair oil, but less common in modern usage. May appear in traditional contexts or product names.
In the past, camellia oil was used as hair oil.
Refers to any oil applied to hair, not necessarily a commercial product. Could be cooking oil or natural oil used for hair treatment.
ヘアオイル is the default for modern, Western-style hair oils. Use 椿油 specifically for camellia oil, which has cultural significance in Japan. If you're unsure, ヘアオイル is safe.
I bought hair oil at the drugstore.