If you are expecting Korean Ninja, sorry not.
This is rather a proof of there was no Ninja in Korea.
Annals of Joseon Dynasty
Jungjong annals 15
Jungjong 7th May 5th (1512 May)
This record was written 2 years after Sanbo-No-Ran (Riot by Japanese settlers in Korea)
The Japanese prisoner Yoshira (要時羅) testified to the interpreter
"I tell you everything I know because I'm gonna have to be Korean rest of my life.
The Japanese whose family members were killed during the riot asked the lord of Tsushima (So clan) to send troops.
The lord said if they don't make peace, he would plan to send troops to Koje(巨濟).
It is obvious they will come within this year.
It is only 48soku from Tsushima to here, Koreans won't be able to defend if they land during dawn.
And what is more, there are Shinomi(時老未) in Hakata（花加大）.
They are good at disguise. They can sneak into enemy camp like mouse, escape like bird.
No guard can notice.
Tsushima recruited them to set fire on camps.
I heard people from Tsushima talking about it."
The testimony was reported to King and King told to The Military Affairs.
The Military Affairs told to King "What Yoshira said about Tsushima brings people good at disguise from Hakata is ridiculous, it's obvious the story is for scaring us.
But asking Tsushima to take revenge seems to be true. It is better to order to secure defence."
According to Professor Shosuke Murai (Tokyo University), Yoshira is Yoshiro(与四郎) , Shinomi is Shinobi. This testimony proves there were Shinobi in Hakata area in those days. (Of course Hakata is Kyushu Japan) And that means Sengoku war lords were hiring Shinobi.
Korean paper Joong Ang Ilbo provoked Hapkido issue again.
Title "Is Hapkido a Japanese martial art? Knower doesn't think so"
The purpose of the article is that Hapkido was from Aiki Jujutsu but Korean added kickings'n stuffs so now it's Korean martial art. (Same theory as TKD)
The article sounds like it's wasting to dispute origin of Hapkido but never forget to insert it originated in Three Kingdoms hoax.
Such a theory exists only among Korean ethno centrists.
Another hoax in the article is Choi learnt from Sokaku.
As I said on "Verification of Hapkido History" video, there's no trace that Choi was Sokaku's pupil. Sokaku didn't own a dojo, he taught to people who paid and invited him.
Sokaku left the record and Choi wasn't listed.
The Watanabe Documents(150 pages) was discovered in 2000. Koka city has researched the documents since last year and they released some info.
According to Sankei's report, the documents contain exprosive's recipe, instructions for Musket and horseback riding, and some occult arts.
During Edo period, they were hired as "Oshinobi-yaku" by Owari Tokugawa clan.
"Oshinobi-yaku" was like part time job, they were called only needed.
Otherwise, they were living as common farmer.
Nikkei's report says, Oshinobi-yaku was secret contract.
They found 10 written pledges of keeping it secret from family and friends between 1700 ~ 1829.
It seems the Ninjutsu documents were only 17 pages(include the pledges?)
Koka city is going to publish the documents.