"Noah Wrestlers Association"

I am unsure of what exactly this is, but Go Shiozaki is the chairman of the committee (I believe that Takashi Sugiura is also on the board). I believe that this deals with protecting the rights of the wrestlers, dealing with pay issues and health insurance.

The association is not exactly a union (it's not going to tell them to strike), but tends to lean more towards speaking for them as a whole, and ensuring that they are taken care of. One thing that Mitsuharu Misawa, the company founder, was always concerned about was what would happen to wrestlers when their in-ring lives were over. Before he died he had planned to open a restaurant which would have been staffed by veteran wrestlers, which would have given them an income and a purpose, so it is conceivable that the new Noah would create something to take care of its roster, the way old fashioned All Japan did not.
In the past Go Shiozaki has been the one to address the crowd at the Christmas shows, and present flowers from the roster as a whole at various events. In short it gives them a voice. The Noah Wrestlers Association is not the booking team.

Naomichi Marufuji may also be on the committee, as he is the roster manager (Takashi Sugiura held this position from 2011 until 2016), and so would deal with any issues and personal concerns in the day to day life of the roster whether in the dojo or on the road, and probably mediate disputes amongst people jammed together for such a long period of time. He would not get involved in anything regarding pay, health insurance etc.

"Hoss Fight"

Wrestling slang\western. Comes from "horse fight" ("Hoss" being a southern American word for "Horse"). It basically means a massive fight between two large beasts, which are usually either heavyweight or thickly set junior wrestlers. Technical wrestling is not a factor in these matches, they are usually two fighters who punch, slam, kick and throw each other around, and they don't hold back when doing it.

"Mud Boat"

Phrase used by Kazuyuki Fujita to describe Noah, it has two possible meanings;

1. An easy to sink ship made from mud, it mat also be from a parable about something that is likely to go away soon.

2. Kabuki reference. Kabuki is traditional Japanese theater, in which the stage is very spartan. A box with mud in it was used to represent a pond, lake, rice paddy etc.

"Passivity"

"Acceptance of what happens, without active response or resistance."

"Passivity" is a term used in Noah, and handed down by Mitsuharu Misawa to the All Japan and Noah dojo's, and is still used and taught today. The company surrounding Noah might have changed, but the training still very much remains untouched and belongs to the seniors.

"Passivity" basically means the skill to receive a technique. Misawa taught that to know how to do a move is not and was not enough, you must be able to "receive a technique" also just as well. The equivalent to this in the West would be "selling" or "how to sell".

"Young people, outsiders and fools"

A phrase that has been used since ancient times which basically means "when history changes", and is meant to reflect how young people who are stuck with stereotypes, a fool who can not fit into the framework of things, and a stranger who doesn't know the way, who all up until now, have been stuck in their various roles, who work together to change something. Recently used as the title of a book regarding urban renewal and town planning.
The phrase was used by Tokyo Sports in an article about Hideki Suzuki coming to Noah and facing Go Shiozaki at the Kultz Kawasaki event in July (although Suzuki used it in reference to a quote by Shinya Aoki, a Japanese athlete who does both MMA and Wrestling). They had to change it to "a stranger and a fool" as naturally, at 39, Suzuki is not a "young person". The article also spoke of the renewal of Noah, which fits in with the reconstruction theme of the phrase used in the title.

"Okakin"

Kinya Okada's nickname which is a combination of his surname "Okada" and his first name "Kinya". I would imagine that it is a pun on "Oka-kun". Interestingly, Naomichi Marufuji was called "Fujimaru" by Mitsuharu Misawa and Jumbo Tsuruta.

Okada is also known as "Chunky".

"Demon Staircase of Hell"

Phrase used by senior referee Shu Nishinaga and the Noah ring crew 

"The Demon Staircase of Hell" or the "Devil's Staircase" is a name given to the notorious staircase at the Shin Yuri Twenty One Hall, Kanagawa.
The venue does not have a loading bay for the equipment truck, so the ring crew and the trainees have to carry the ring bit by bit from the truck, across the plaza and then down this long staircase and then into the hall and then back again after the event finishes.
Noah normally visit the venue in the summer, so this is usually done in the heat.

(Gif credit: Mikata Fuyuki)

"Noah Born"

Term used in Noah for anyone who graduated from the Noah dojo and debuted in Noah, whether or not they stayed with Noah for the duration of their career.

KENTA & Naomichi Marufuji are not "Noah born" (although it is a misconception that they are), having trained at and graduated in All Japan, Takashi Sugiura is a grey area having trained in the All Japan dojo, but making his debut in Noah.
The first true "Noah born" therefore, is Kotaro Suzuki, who debuted in Noah in December 2001 (he refers to himself as "the prodigal son").



"Noah born" include: 

~ Go Shiozaki
~ Shuhei Taniguchi
~ Atsushi Aoki
~ Eddie Edwards
~ Hitoshi Kumano
~ Kaito Kiyomiya
~ Junta Miyawaki
~ Yoshiki Inamura
~ Kinya Okada
~ Kotaro Suzuki

"Older Brother"\"Senior Student"

"Older brother" (or more commonly "senior student") is a term used in Puroresu to signify that two people have been trained by the same person. The term "older sister" is used among Geisha for the same reason.

Age does not play a role in determining who is senior, as for example Naomichi Marufuji was born in September 1979, but he is the older brother\senior student of the older in years Kotaro Suzuki who was born in 1978, because he was trained before him by Mitsuharu Misawa and he debuted before Suzuki, Marufuji is therefore the elder student.

KENTA & Go Shiozaki are another example, as both were trained by Kenta Kobashi. The bond between KENTA and Kobashi is absolute, with KENTA still going to Kobashi for advice and mentorship, and Kobashi supporting KENTA no matter what he does and where he goes. Kenta Kobashi had also used to address Mitsuharu Misawa as, "Oniisan" ("Older Brother"), which is what Kotaro Suzuki calls Naomichi Marufuji. 

The other term for "older brother" is used between Kenoh and Kaito Kiyomiya. Kiyomiya is Noah born, whereas Kenoh came from Michinoku Pro. Their relationship is likened to brothers, not only because they were in a unit with Takashi Sugiura together (who bought them both into the heavyweight league), but because there is this bond between them (although they are often at each other), which is like brothers with Kenoh swinging between hatred, jealousy and concern for the much younger Kiyomiya with the pressure the company has placed on him and what will happen to him in the future, and Kiyomiya (despite everything) looking up to Kenoh, (despite the fact he hates him), and also adopting his blonde hair and similar hairstyle. Kenoh is also the only person who Kiyomiya isn't scared to be (slightly) rude to. Their short lived tag team strengthened these bonds, as Kenoh was often seen giving advice to Kiyomiya, and for once...smiling.
Behind the scenes there is a bond between them, as they often practice together at the dojo (Kenoh says he doesn't like training with lots of people, but seems to tolerate Kiyomiya) and the touching moment when Kiyomiya almost fainted due to a neck injury at the Misawa Memorial in 2018, and Kenoh reached out to steady him. 

"The Mighty Don't Kneel" (Shane Haste and Mikey Nicholls) refer to Hitoshi Kumano as "little brother".

Kongoh

Unit formed in May 2019 by Kenoh, who was protesting against the new Noah owners LIDET (Kenoh is paranoid and thinks they are keeping him down). The unit currently consists of Kenoh, Atsushi Kotoge, Yoshiki Inamura and Masa Kitamiya ("The Tough").

The name "Kongoh" has a triple meaning; the meaning Kenoh intended primarily is "diamond" (as he is always shrieking that he will make Noah's ring shine). The other meaning is the thunderbolt, which is the Buddhist symbol of truth (again which also plays into Kenoh's statement of how Kongoh is the only truth in Noah, and how they are the only ones who are not afraid to speak it), the third meaning is the Kongōrikishi, who are the muscular guardians of Buddha, and who are depicted as wrestler like (it should be noted that some Japanese fans fine this last meaning to be inauspicious).

"Shura Road"

Used by: Kenoh 

"Shura Road" is a term that means a long unrelenting and ultimately ruthless battle. It comes from Ashura, the Buddhist deity of war, who originally was the god of justice, but was chased from heaven. The sutra's speak of Asura's war against Taishakuten (who interestingly is linked to Buddhist Four Heavenly Kings), which is where the phrase originates. 

Ashura however does have six roads which are all tied in with the Buddhist belief in reincarnation. I don't think, however, this is what Kenoh is referring to as the Hell Road (despite the demon's wearing red) is linked to redemption.

Kun

"Kun" (君) or (くん) is a Japanese honorific, and is usually used in two ways in Japanese society/Noah/Puroresu;

1. By a senior addressing a junior. For example, Takashi Sugiura might address someone like Junta Miyawaki as "Junta-kun" or "Miyawaki-kun". Miyawaki would however never address or refer to Sugiura as anything other than "Sugiura-san", which literally means "Mr. Sugiura" as Sugiura is not junior to him.

2. When fans use it, it is used as a term of endearment. It's hard to explain as there is no equivalent in English. It's a little more formal than using the suffix "chan" (i.e. "Ken-chan", "Kat-chan", which are used for nicknames, Marufuji has called Sugiura "Sugi-chan" and YO-HEY refers to himself as "YO-HEY-chan" occasionally), so I guess it can be almost seen as the most you can get away with and a middle ground between "chan" and "san". Some fans put the word "kun" on nicknames for wrestlers i.e. Ken-Kun (KENTA). It is not something that fans would ever address someone like Kenta Kobashi with however.

3. It can be used between people of the same age group, and you may sometimes hear men address their peers with it.

Why Naomichi Marufuji & Kenoh use it. 
As stated above the suffix "kun" in this situation is used by a senior to a junior, and Marufuji and Sugiura sometimes address Kenoh as "Kenoh-Kun" (or Ken-kun) to show the fact that they are his seniors. Kenoh, however, uses it back to them as a mark of (kayfabe) disrespect, as in reality he wouldn't be addressing them as this or referring to them as that in conversation.  In the case of Marufuji and Sugiura addressing Kenoh as it, its almost as if they are patting him on the head and treating a grown man like a small child, or else a small child who is playing make believe that he runs a bank or something. Kenoh uses it back to them, "Marufuji-kun" in particular, like he is addressing him as "junior".

Daisuke Harada addressed Yoshinari Ogawa as "Ogawa-kun" (which ironically mimics the heavyweights, who Harada hates), which is an act of supreme cheekiness as probably no one has called Ogawa that since he was a trainee in All Japan.