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I'm new to this forum and to cultivating bonsai trees but I'm hoping for some advice. My late father grew a Japanese Black Pine tree and when he died several years ago I inherited the tree. The tree was struggling a bit so for the past four year I've grown it in open ground in order to strengthen it. Around February time I transferred the tree to a pot and wired the branches. For a couple of months the tree seemed healthy (picture attached). However recently the needles appear to be dying on one branch and then other branches. Any advice you can give on what I am doing wrong or what might be causing this would be appreciated. As you can imagine this tree has a great deal of sentimental value to me so I'm desperate to save it.
Thanks

can't see the pic

Hopefully the photos are attached this time

so you repotted and wired at the same time? Could have been too much for the tree.
How much of the roots did you cut off?

Yes I did repot and wire. I tried to keep as much of the root system as possible but to be honest there were only large fibrous roots and very few smaller hair like roots when I removed it from the ground

repotting and wiring at the same time is a big hit on pines and is most likely stressed. as a general rule i would only do one major thing a year to the tree. so repot this year wire next year kinda deal. hope it pulls through.

The wiring is not good, it is too tight loops, The tree is looking ok, sometimes branches will die, it is not unusual. I would remove the wire now, and allow the tree to grow this year, keep it well watered and let it grow. It also does need a bonsai pot, but not for at least two more years. Are you sure it is Black Pine? The small branches are dead so you could cut them off unless there is some green, take the wire off and fertilise through to early autumn, then stop.

Thanks for the advice. I've done as you suggested. I think it is a Black Pine but not 100% sure. Did you think it might be something else?

Butty wrote: Did you think it might be something else?

Sorry, I will chime in. Looks like a JBP alright.
But..
IF this tree was mine, I would wait till Winter and then...
Hard prune it, chopping off the branches marked in light blue.
I would keep the actual leader IF it is there just to be a sacrifice branch, otherwise it is already too thick and I would chop that one too using the branch in the left to be the new leader (and eventually a new sacrifice branch).
The right branch is dead, take it off.
The left bottom branch is making a "T-Bar" with the right one, just get rid of it before the trunk swells at that point.
The green line is what I would keep, hoping that the tree will sprout new growth down low.
I would also bend the hell out of this tender trunk to make the whole thing shorter, closer to the base.
But...
It is not my tree.