Hi Friends,
Great info!  Very much appreciated. This piece will be in my private gallery (along with about 250+ blades; moro, lumad, visayas, luzon and foreign swords).  I was just afraid that once I have displayed it (as a conversational piece), I may not be able to answer and share why a Lumad kaolo blade has Japanese markings  
 
Again many thanks and hope you are all well.  Keep safe!
Yves