So so sorry about having to post this question here. It is not FT related but might be Japan related.

Was window shopping just now and came across a huge range of hair dye. I think most of the hair dyes that's on sale here are the same as what we have in the UK. A peroxide tube to be mixed with the colourant just before use. I believe one-two of the ranges are also plant based?

Anyway, I saw something called a touch-up. Just a single tube, with a comb? Would something like this product be for a single use or multi-use? Is it semi-permanent or permanent?

The reason why I'm asking is because I noticed five!!! strands of grey this morning. Very very unhappy now. I've pulled them all out but I need some sort of 'ad-hoc apply to single grey strands or grey roots' kind of product for future use. I could either colour my whole head or pull out each single grey strand. But I don't really have time to colour the whole head every time one little grey appears. If I keep pulling out each little strand, I might end up hairless in a couple of years.

Any advice on the Japanese products would be most helpful. I think Japanese toiletries are wonderful and thought I might be able to get something whilst I'm here now.