Gentlemen
I am sorry to have joined this debate so late. I am pleased that so many like Sasaki's uichiko. He is also an old family friend of mine (I had dinner with him after Dai To-ken Ichi in November) and I know his uichiko is very fine and of excellent quality. I did not see it mentioned about after-polish care so I thought I should. After a sword is polished, for a few months it will "sweat" water and this must be cleaned off immdiately or your new polish will soon become damaged. You should use your good uichiko for this. Also, after a sword has been out on display or viewed, it should be uichiko'd as soon as possible and then oiled (if you keep a sword oiled, some don't). Mostly uichiko is for removing choji-abura which can not be done with the new impregnated cloths. You should learn to use uichiko properly and safely as part of your original sword care and etiquette training, such as how to uichiko swords with horimono etc. By the way, in caligaphy, the little up-strokes or flicking at the end of a stroke are also called hike, the scratches so refered to are at the end of a poor wiping action when removing the uichiko iin a similar way as the caligraphy strokes. Only use good uichiko on good swords, but mainly do it correctly and with a light hand.
Good old Jim Kurasch had a few funny ideas but mainly he was sound.
Regards
Clive