How to give an unused knife a shiny mirror finish with sandpaper

I made a video on how to mirror finish a 20-year-old German Solingen that has not been used for many years.
This time, I manually mirrored it using sandpaper for about 2 hours.In the video, I used cork to polish the knife without worrying about cutting my hands.
If this is well received, I would like to teach you a simpler and more reliable mirror finish method using a Japanese knife.
Please ask questions about the mirror finish and even questions. I definitely want to respond.
#japanesefood＃chefsushi＃sushilovers＃japaneserestaurant#asmr
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[@helloguys6946]

BEST TUTORIAL

[@mikenorris6769]

Very nice and helpful video!

[@mariowit]

Thank you for making this video

[@akhtermanek4549]

outstanding

[@Steven-v6l]

what grits of sandpaper ??

[@uridog5]

240 to the 10000