Yes, Japanesse Samurai had highly developed unarmed combat skills, but they used them mainly to be able to die when continued resistence even with bare hands.
Practical applications this had almost in 0 value because in samurai era Japan they weren't poor.
Samurai was able to buy not only katana, short sword and tanto, but second backup tanto too.
Units commanded by samurai used bows and arrows, they had bow usage skills comparable to early medieval England or Mongolia, so really high level.
Samurai widely used also spears for throwing, long spears for fighting and only then, if they had not any items to throv, started sword fighting.
In usage of available items for throving, including stones and knifes they were at high skills level.
Due to inferior metallurgy and smithing thy used single bladed swords more often than double bladed. Short swords and tanto were single bladed.
All fencing was more crude than in Europe even in 500 B.C and then isn't worth to compare with medieval knights, late medieval era pirates, officers, feodals and paid swordsmans.
Their fencing skills were lower than casual european students skills even 200 years ago.
___
After WW2 Martial Arts were more commercialised and Japan had destroyed economy, heavy burden of different taxes and weak upper middle class.
They thanks to TV and fancy demonstartions achieved in U.S and Europe public opinion, that they are superior in fencing, knife fighting than our heritage was….
We didn't offered belts in sword handling and fencing with different names and European heritage was not able to offer multiple dan ranks to enchance western man's [prestige in society. They had and we were happy to forget our history and heritage in order to believe that we were lesser knowledgeable…..
Despite our ancestors had fights even with two double edged swords more than 2000 years before radio appeared in world.
Despite our youngsters 200 years ago knew how to fight for life with double edged sword in one hand and double edged knife in another hand.
Before WW2 students and officer clubs, frathernities had for fun nice tutelage in fencing, wow….no belts.
We choosed believe that strangers are superior because rituals and kitchen knife usage as back up weapon ; tanto IS kitchen knife by pre WW2 european standarts and there nothing to do with this truth.
In many countries it still is kitchen knife because dont have guard, single bladed. Hunters don't likes them and I have one this kitchen knife to use in kitchen, it has certificate, that it is kicthen knife. Okey, large butchers knife or fish filleting knife too are kitchen knifes, even if larger.