I'm certainly no expert on higonokami (or anything else for that matter 
No, higonokami are strickly friction folders, not detent to closure. Mine is quite tight and doesn't tend to open spontaneously. If you need to tighten the blade I guess (?) just tapping down some on the pivot pin would do it.
Rich
The Japanese Sword Index
http://www.japaneseswordindex.com/nihonto.htm

No, higonokami are strickly friction folders, not detent to closure. Mine is quite tight and doesn't tend to open spontaneously. If you need to tighten the blade I guess (?) just tapping down some on the pivot pin would do it.
Rich
The Japanese Sword Index
http://www.japaneseswordindex.com/nihonto.htm