Good evening,
Picked up this Daisho set signed and dated Yoshu Matsuyama Ju Shoami Moriyoshi Saku living in Songshan mountain in Yuzhou. Anei period, one lucky day of February 1780 ( 豫州松山住人 正阿弥盛祥作 安永九庚子歳二月吉祥日 ).
My question is on the back of the Dai near the top, you will see an area of darkened color. Is this healthy stabilized black rust setting in or something else that may need care? Also noticing it a little bit on the front as well as on the Sho.
On the tsuba maintenance topic, il throw in that reading through numerous threads and recommended techniques, there does not seem to be a consensus on how or to what extent(if at all) one should care for them. I am afraid to remove patina, hinder growth of stabilized/protecting rust and revert/prevent what the smith may have intended it to become with age. Outside of regulated temp and humidity levels I had planned to lightly polish with choji & cotton once a year but please feel free to correct me or share your techniques.
P.S. - Anyone able to translate the large Motif/Kanji characters?
Thanks!