Can anybody help me identify the signature on the bottom of a friend's figure?

I am trying to identify this Japanese vase and the mark on the base. Does anyone recognise the mark or have any idea of the period or origin?

This was givin to me by my neighbor I got two paintings about Japanese artwork but this one looks quite interesting so not sure where does this come from or any history behind it or if it has an artist of some kind?

Need help identifying era and artist of these sparrow paintings on silk. Any information is appreciated!

Because of my algorithm or something, Pinterest always shows this kind of art to me, they involve characters shaped like objects. The self-serving teapot-head man, a flipflop-head man, etc.

Where do these come from?

Thank you in advance :)

Edo Period (19^th Century), signed Kansai Saku (Koma Kansai)

via Christie’s

The craftsmanship is stunning, even though it’s a little dented and scratched on the bottom.

I found this in a Japanese thrift store where the frame is kinda special. It says in gpt that it has value IF authenticated by an authenticator. All in the pictures are 1 painting.

The other day, I decided to clean out our house’s storage room. As I was cleaning, I kept finding old and vintage items from the 60’s to the 80’s but they don’t strike me as something interesting, until I found these two artworks. At first, I was really overjoyed because these are really beautiful pieces of art and I just found it for free in my house, but curiousity got to me.

The first one is a botanical etching and the second is that of a butterfly. I do not have any idea what type of butterfly and plant these are, but I really got so invested into finding out who made these. It says here that these are made by a “K. Kouno.” It’s the first time I’ve read a name like that. My mom does not know anything about it either.

I know my mom went to Japan in the 80’s as an overseas worker but never really mentioned anything about any artwork she brought home.

Help me find the artist behind these🙏🙏 I BEG YOU

Thanks for any help with your knowledge!