Art of China and Japan

[Astroway]

Good day to all!
There is a triptych signed and stamped , silk pasted on paper, traditionally decorated scroll ( on the edges of two wooden planks rounded ), age presumably the first half of the 20th or the middle of the 20th century , the size of each image 50h90sm . Need help in reading the sign, or someone can tell the author's style or other features paintings.

1. left
2. average
3. right
4. signature in a larger size