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ZST
Company type	Private
Industry	Mixed martial arts promotion
Founded	2002; 23 years ago
Founder	Kōki Hioki
Headquarters	Yoyogi, Shibuya, Tokyo, Japan
Key people	Jō Uehara
Website	http://www.zst.jp/

ZST (pronounced Zest) is a Japan-based mixed martial arts promotion and sanctioning organization holding amateur and semi-professional MMA events. ZST adopts unique rules in the MMA industry and also used to hold tag-team MMA matches.

History

Before establishment

ZST was conceived in efforts to accommodate fighters of puroresu MMA promotion RINGS that went defunct in February 2002. On September 22, 2002, Takeshi Caesar, the president of Shoot Boxing Association (SBA), and Koki Hioki, representative of ZST, had a conversation after a Shoot Boxing event, and they announced that SBA would support ZST. For this reason, ZST promoted some matches under shoot boxing rule early on.^[1]

First event

The first ZST event "The Battle Field ZST Opening Event" was arranged on November 23, 2002 in Tokyo, and it has since experienced a dramatic increase in popularity possibly in large part due to their highly different rule format. In this event, not only usual MMA matches but MMA tag match also was held among Takumi Yano, Masakazu Imanari and Remigijus Morkevicius, Mindaugas Stankos .^[2]

ZST GP

On November 23, 2003, "ZST GP Opening" was held in Tokyo.

On May 17, 2008, ZST announced a major partnership with DEEP. The partnership will allow the two organizations to co-promote shows, share fighters and eventually unify the organizations.^[3]

Rules

ZST Rule

Bouts consist of three rounds with a rest period of one and a half minutes. The first and second rounds are five minutes in duration and the third round is three minutes in duration, but the third round is an extra round. Punches, elbow strikes, knees and kicks are allowed to the head and body when both fighters are standing. On the ground punches, elbow strikes, knees and kicks are only allowed to the body. Bouts are not judged. In the event that the bout goes the full-time, the bout is ruled a draw.

Grappling rule (GT-F Rule)

Bouts consist of two rounds with a rest period of one and two minutes. The first and second rounds are five minutes in duration. The positioning is not regarded for scoring as important factor and any motions including clinching and holding which impedes bouts are prohibited. GT-F came from "Grappling Tournament - Featherweight".

Events

ZST holds various types of events depending on their theme.

ZST
The main events held regularly under ZST rule for the top contenders.
ZST GP
The tournament events under KOK rule. The events are divided to twice.
Battle Hazard
The events focusing the matches which are not under ZST rule.
GT-F
The tournament events of grappling.
Genesis
The opening matches of ZST and Battle Hazard for the fresh professional contenders.
SWAT!
The events focusing the fresh professional contenders who currently participate Genesis matches. It holds "Genesis tournament" every year, and it is an actual freshmen tournament.
Pre Stage
The events of grappling for the amateur contenders.

Weight division

ZST sets 11 weight divisions.

Weight division	Weight limit	No.	Name of Champion	Nationality
Absoluteweight	No weight restrictions	-	Vacant	-
Super heavyweight	Unlimited	-	Vacant	-
Heavyweight	105 kg (231.5 lb)	-	Vacant	-
Cruiserweight	95 kg (209.4 lb)	-	Vacant	-
Light heavyweight	85 kg (187.4 lb)	-	Vacant	-
Middleweight	80 kg (176.4 lb)	-	Vacant	-
Welterweight	75 kg (165.3 lb)	-	Tetsuya Yamada	Japan
Lightweight	70 kg (154.3 lb)	3rd	Sho Kogane	Japan
Featherweight	65 kg (143.3 lb)	4th	Tetsuya Seki	Japan
Bantamweight	60 kg (132.3 lb)	1st	Keisuke Fujiwara	Japan
Flyweight	55 kg (121.3 lb)	4th	Tatsuki Saomoto	Japan