Hand Towels, Head Scarves and Handkerchiefs

What to buy in Japan?

Looking for Japanese traditional head scarves I ended up on the Japan Monthly Web Magazine page on "Tenugui" or cotton hand towels.  Everybody is going to get a tenugui, a furushiki, or a pen.

For myself, I'm going to pick up some handkerchiefs.  I haven't been able to replenish my supply at second hand stores or yard sales and making my own handkerchiefs with a rolled hem is a bit daunting.  I have read in multiple places that a handkerchief is essential for Japanese women and it would be kind of nice to have one with the Tokyo subway on it.  BUT I can't blow my nose with it (there are tissues and a particular etiquette for that), just wipe my brow or dry my hands after a visit to the washroom.

In Japanese it is called hankachi (ハンカチ) which leads me to believe that it was originally a European import.  Turns out it was a replacement for the tenugui.  The Tokyo Weekender also claims that the handkerchief is essential since many public bathrooms don't have hand dryers.  "In the warmer months especially, handkerchiefs are available literally everywhere: they come as a freebie with fashion magazines, and rows of designer editions are displayed at department stores."

Or maybe an O-mamori, a Shinto or Buddhist amulet, if I can determine what the ones I buy are for, whether health, money, love, academic success, pets or protection against traffic accidents (maybe instead of trip insurance?).

I would pick up a souvenir apron but the Asians don't allow for large Western breasts.