Japanese sword forms, Judo and Shorinji Kempo all have a technique called Tsubame Gaeshi (which roughly translates to swallow counter).
Why is the phrase Tsubame Gaeshi considered sufficiently important by the founder's of these three styles for them to name a technique this way? According to this source https://japancraft.co.uk/blog/hidden-language-japanese-embroidery/ swallows are considered lucky amongst their other connotations. Does the choice of name symbolise luck? Or is it perhaps to do with how swallows fly?
