Your 'ko-Shoami' explanation was helpful. Thank you.
but any idea on specific maker, period, pattern, etc.
I know it is a basket weave pattern (and yes, I am aware it resembles to 'Star of David'), but what is the Nihonto terminology? I would also like to know the pattern name in Japanese (Kanji).
Basically anything that will help me find further info on it.
It is in my 'wish-list', but I cannot search for it without knowing what it is.