Newlyweds at the son-in-law ink festival at Matsunoyama Onsen, Tokamachi City, Niigata Prefecture
After the son-in-law is thrown, a tower called the Sai no kami (Sai no kami) is burned (the so-called sagicho, a kind of tondo-yaki), and the remaining ink is applied to each other's faces while saying "congratulations" to praying for a disease-free life.
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