Top left tsuba, would need to see more detail of it to make a determination, could be nagoyamono.
top middle is run of the mill imo.
top right is nice but looks odd as previously mentioned, the tree looks like bright copper and was probably supposed to be patinated shakudo, as well as the sekigane being bright, probably hit with polish at some point recently.
boar kozuka looks like the boar has been polished up a bit as well, otherwise average work.
the go player kozuka looks waki or kaga goto. the menuki are probably a set that wast paired with the kozuka later imo.
the katakiri-bori or "carved" kozuka is nice, could be mumei yokoya?
The second to last kozuka looks like it says yukiyoshi 行善, and looks like the back was polished.
the last one is average work to me as well.