Is it true - that every time (You finish playing the Shamisen) you have to remove the Koma.
If you don’t it will - put stress on the skin (it may rip the skin)
and the strings need to loose up
I’m thinking to myself - if you keep removing the bridge and putting back on - does the string take more stress because of loosening and tightening the strings (from tuning an non-tuning)
I’ve used the same strings since late november. You notice that the strings are taking a bit of a beating from dragging the koma off and then back on every time you play. You can minimize this by lifting the strings a bit while doing it.
Usually strings lose sound quality faster due to other stuff like moisture and the stress of being stretched. I guess that if your koma is sharp you can have strings snapping more often. I can only speak for myself but I bought 4 extra sets of strings and I have not yet used them since they haven’t snapped yet.
haha yes i remove the koma everytime nowadays but first i didn’t and the results are clear. When i got my shamisen last july it came with 3 extra 3rd string, 2 extra 2nd string and 1 extra 1st string. And i have used 2 of the 3rd ones and 1 second strings, but when i changed to removing the koma i haven’t broken any strings since that and i started doing that around 9th of 2011
Kevin Ho,
Haha, Youre thinking too much again man! Taking the koma off isnt going to loosen or tighten the strings. The only thing that will loosen or tighten strings is the itomaki (tuning pegs). The strings should be more or less in the same tuning you left it in before taking off the koma.
But generally if you are not playing for a while it IS a good idea to loosen the strings
( it has nothing to do with removable koma though).
Karl- You don`t really need to “drag” the koma off the strings. If you put the bachi under and use it to pull the strings upward, the koma will just slide right off.
Then we are considering “drag” in different magnitude 
I did not mean that you have to use any particular force. I was more referring to the action of moving it along the strings. Maybe it was my talk about taking a bit of a beating that led to this. I don’t think I’m doing it wrong, but maybe I am?